Not generic search results. Not forum guesses.
Structured diagnostic thinking from a real RV technician —
to help you find the likely cause, understand your system,
and know what to check next.
Whether you're dealing with a problem right now, trying to understand how something works, or staying ahead of issues — there's a place to start.
01
🚨Something's Wrong Right Now
Urgent Problem Help
RV problems rarely happen at a convenient time. Get calm, structured guidance through the most logical diagnostic steps — so you're not throwing parts at it or making things worse.
Slide stuck outLeveling jacks won't retractNo heat or coolingPower issueAwning won't close
Problems feel less scary when you understand the system. We explain sequences of operation, common failure points, what controls what — in plain English, not service manual jargon.
Leveling system sequenceSlide room mechanics12V vs 120V systemsPropane appliance logic
What is the system doing — or not doing? We start with what you're seeing and experiencing, not assumptions.
02
Separate Likely from Possible
Not every symptom has one cause. We show you the most common patterns a technician would expect first — then what else to rule out.
03
Know What to Test Next
We tell you what to check and why that check matters — so you're moving logically through the system, not randomly.
04
Understand the System
Every diagnosis comes with context — how the system works, what controls what, and why this failure makes sense.
05
Know When to Call a Tech
Sometimes a professional is the right answer. We'll tell you that honestly, and explain what information to have ready.
⚙ Diagnostic Philosophy
"We're here to guide you through the problem, show the most logical and common reasons you may be seeing this failure, and explain what to test next — and why."
This is technician-guided help. Not a magic answer machine. Real diagnostics sometimes don't have one neat answer — boards fail, sensors shift, harness issues happen. We work from what's most likely, not what sounds most reassuring.
📏 Leveling System Rule
Before calibration or any advanced reset: fully retract all jacks and hold retract several seconds after they stop. On fifth wheels, hook to the truck first to remove load from the landing legs before retracting and retrying auto level.
Why This Is Different
Better Than Random Search Results
Generic search and forums give you possibilities. We give you technician-pattern thinking — structured, prioritized, honest.
Generic Search / Forums
✕Random possibilities with no priority order
✕No explanation of how the system works
✕Confident-sounding answers that may not fit your situation
✕No guidance on what to test or in what order
✕People throwing parts at the problem
✕Fear-based framing — worst case first
The Pocket RV Tech
✓Likely causes ranked by real-world frequency
✓System education built into every guide
✓Honest about what we can and can't determine remotely
✓Structured next steps with reasoning, not just steps
✓Logic-first: eliminate causes before replacing parts
✓Calm, practical — reduce anxiety while giving real direction
The Pocket RV Tech was built by a Journeyman-certified RV technician with over two decades working on RV systems — everything from leveling systems and slide rooms to propane appliances, 12V wiring, and everything in between.
After years of watching people spend money on the wrong parts, wait weeks for service appointments, and feel completely in the dark about their own rigs — this is the resource that should have existed already.
This is not generic AI content. Not assembled from forum posts. This is real technician pattern recognition — the same thinking that gets applied in a shop bay, put into a format that helps you work through problems yourself.
We don't pretend to have every answer. Hidden issues happen. Sensors shift. Boards fail. The goal is to get you to the most logical place to look first — not to pretend certainty that doesn't exist.
21yr
Hands-on RV industry experience
JM
Journeyman RV Technician certification
3
Entry paths: urgent, learning, maintenance
∞
Free guidance — no paywall for the basics
⚖️
A Note on What We Can and Can't Know
Remote diagnostics have real limits. We can tell you what's most likely based on your symptom, what to test, and what pattern a technician would expect to see. But hidden faults happen — a harness problem, a failed board, a factory defect. We'll always tell you when the logical next step is a professional inspection, and what to tell that technician when you call.
Access Options
Genuinely Useful for Free
Start with real help at no cost. Upgrade when you need deeper tools.
Free Tier
Get Started
$0 / always
Real diagnostic help, no tricks. We believe in earning your trust before asking for anything.
You mentioned a gas smell, smoke, sparks, or burning smell. Do not continue troubleshooting. Do not use any switches or outlets.
Get everyone out of the RV. Ventilate immediately. Contact emergency services or a qualified technician.
Arrival Scenario · Start Here
Just Arrived and Nothing Works?
This is one of the most common situations RV owners run into. Most of the time it's something simple.
We'll check the easy things first — one step at a time.
💡Do you smell gas, smoke, or anything burning? Tap here first if so.
Step 1 of many · Identify the Problem
What's Happening?
Pick the option that sounds closest to your situation. Not sure? Choose the closest match — we'll narrow it down.
Branch A · Step 1 of 4
First Check: Shore Power
Most total blackouts at a campsite come down to one thing — the RV isn't receiving power from the pedestal. This is very common.
Why this matters: Your RV uses campsite power (shore power) for outlets and appliances. If it's not connected, nothing 120V will work.
01
Walk outside and check the power cord
It should be fully plugged into the campsite pedestal. Push it in firmly — a loose plug is more common than you'd think.
Branch A · Quick Fix
Plug In and Try Again
Connect the power cord fully to the pedestal. Push it in firmly — it should seat all the way and feel secure.
💡 What most people miss
Make sure you're plugged into the correct amp service — 30-amp and 50-amp receptacles look similar but are different. Also check that the pedestal breaker is in the ON position before connecting.
Branch A · Step 2
Check the Pedestal Breaker
At the campsite power pedestal, there's a breaker for your outlet. It can trip from a surge or previous camper — and it looks like it's still on when it isn't.
01
Find the breaker on the pedestal
It's a switch or breaker near the outlets on the post.
02
Flip it fully OFF, then back ON
Don't just check it — reset it. A tripped breaker often looks "on" but sits in the middle.
✅
That Fixed It
A tripped pedestal breaker is the most common cause of total power loss at a campsite. You're good to go.
💡 Good to know
If the breaker trips again shortly after, you may be pulling more power than the site provides. Check if high-draw appliances (AC, microwave, electric water heater) are running at the same time.
Branch A · Step 3 of 4
Check the RV Main Breaker
Inside your RV there's a breaker panel. A tripped breaker stops power to everything downstream — even if shore power is fine.
Why this matters: One tripped breaker inside your RV can kill all outlets and lights on that circuit.
01
Find your RV breaker panel
Check near the entry door, under a dinette seat, in a bedroom cabinet, or behind a panel near the water heater.
02
Look for any tripped breaker
A tripped breaker sits in the middle — not fully on or off. Reset it fully off first, then back on.
✅
Breaker Reset
A tripped interior breaker is common after a surge or overload. Power should be restored to those circuits now.
💡 If it trips again
A breaker that keeps tripping is telling you something is overloaded or there's a fault in that circuit. Don't keep resetting it — that's when a technician should take a look.
Branch A · Step 4 of 4
Check the Battery Disconnect Switch
Most RVs have a battery disconnect switch. If it's off, your 12V system won't work — even with shore power connected. This is very commonly left off after storage or towing.
Why this matters: Lights, slides, and other 12V systems won't respond if the disconnect is off.
01
Find the disconnect switch
Common locations: battery compartment, entry step area, outside storage bay, or a panel near the main entry.
02
Make sure it's switched ON
Some are a physical knife switch, some are a push button, some are a rotary knob. It should be in the connected/on position.
✅
That Was It
Battery disconnect left off after travel or storage — happens all the time. Your 12V system should be back online now.
Branch A · Step 4 of 4 · Deeper Issue
Likely a Battery or Converter Issue
You've checked the main causes. Here's what's most likely happening at this point:
A
Dead or heavily discharged batteries
Low battery voltage can prevent the RV from responding even when shore power is connected.
B
Failed converter
The converter turns shore power into 12V and charges your batteries. If it's failed, your 12V side won't work.
C
Blown main fuse
Check the main 12V fuses near the battery bank — a blown fuse here can cut the whole 12V system.
⚙ Before you call a tech — tell them:
Shore power amperage you're using · whether the converter fan runs at all · approximate age of your batteries. This saves time on the service call.
Branch B · Lights OK · Outlets Dead
Lights Work, But Outlets Don't
This is very common. Your RV lights and outlets don't always run the same way. We'll check the simple things first.
✅The lights being on is actually a good sign — it tells us part of the system is working.
Branch B · Step 1 of 5 · Understanding
Why This Happens
In most RVs, lights can run on battery power. Most outlets need shore power or inverter power. That means part of the RV can work while another part does not.
Why this matters: Knowing this tells us exactly where to look — the 120V side of your system, not the batteries.
Branch B · Step 2 of 5
Are You Plugged Into Campsite Power?
If you're not plugged into shore power, your outlets usually won't work. Let's start there.
Why this matters: Shore power is what runs 120V outlets. Without it, most outlets in the RV stay dead even if the lights are on.
Branch B · Not Plugged In
Plug In and Test Again
Your lights may still work from battery power. Your outlets usually need shore power. Plug in your power cord, then test an outlet again.
💡 Quick tip
Push the plug in firmly — a half-seated cord can power some things but not others. Also check that the pedestal breaker is switched on before you test.
✅
Good News
That was the issue. This is one of the most common beginner RV power mix-ups — lights run on batteries, outlets need shore power.
Branch B · Step 3 of 5
Check the Campground Pedestal Breaker
The campground power post usually has its own breaker. If it's off or tripped, your RV may be plugged in but still not getting power.
Why this matters: A tripped pedestal breaker is one of the most common causes of dead outlets — even when you're plugged in.
Branch B · Pedestal Explained
What to Look For
The pedestal is the power box at your campsite — the post you plugged your cord into. Open the cover and look for a breaker switch, similar to a house breaker.
01
Find the breaker switch inside the pedestal
It will be labeled by amp (30A or 50A). It should be in the full ON position.
02
Flip it fully OFF, then back ON
A tripped breaker often looks "on" but sits slightly in the middle. Always reset it — don't just check it.
Branch B · Step 3 of 5
Did That Fix It?
After checking or resetting the pedestal breaker — do your outlets work now?
✅
Great
The RV was plugged in, but campground power wasn't actually getting through. You found a very common problem.
Branch B · Step 4 of 5
Next: Check the Reset Outlet
One reset outlet can shut off several outlets in your RV. This is another very common cause of dead outlets that most people miss.
Why this matters: RVs use GFCI outlets for safety. One tripped GFCI can cut power to an entire group of outlets in the bathroom, kitchen, or outside.
Branch B · Step 4 of 5
Check for a Reset Outlet
Look for an outlet with small TEST and RESET buttons. It's often in the bathroom, kitchen, or outside compartment.
01
Find the outlet with TEST / RESET buttons
Check every room — bathroom and kitchen are the most common spots.
02
Press RESET firmly
It should click in and stay. If it pops back out, there's still a fault on that circuit.
Branch B · Step 4 of 5
Press RESET
Press the RESET button firmly. Then test the outlets again.
💡This is one of the most commonly missed causes of dead outlets — don't feel bad if this is it.
✅
Nice Work
That reset outlet was protecting the others. This is one of the most common outlet problems in an RV — and one of the easiest to fix.
Branch B · Step 5 of 5
Let's Check One More Thing
If your RV has an inverter, it may affect certain outlets. We'll check that next.
Branch B · Step 5 of 5
Does Your RV Have an Inverter?
Some RVs use an inverter to power certain outlets. If it's off or not passing power through, some outlets may stop working.
💡 Not sure if you have one?
Look for a panel or switch labeled "Inverter" or "Inverter/Charger" — often near the main panel or in a storage bay. Many newer RVs have one built in.
Branch B · Inverter Check
Check Whether the Inverter Is On
Make sure the inverter is powered on and doesn't show a fault or error light. Then test the outlet again.
Why this matters: Some outlets in your RV are wired through the inverter. If the inverter is off or in fault, those outlets won't work even with shore power connected.
✅
Good Catch
That outlet depended on inverter power or inverter pass-through. Now that the inverter is on, it's working correctly.
Branch B · Breaker Panel
Check the RV Breaker Panel
The main breaker panel controls 120V power in the RV. A tripped breaker can shut off outlets in one area or throughout the whole RV.
Why this matters: Even if shore power and the pedestal are fine, a tripped breaker inside the RV will stop power to the circuits it protects.
Branch B · Breaker Panel Explained
What It Looks Like
It usually looks like a small house-style breaker panel inside the RV. Check for any breaker not fully in the ON position.
01
Common locations
Near the entry door, under a dinette seat, in a bedroom cabinet, or behind a panel near the water heater.
02
Look for any breaker in the middle position
A tripped breaker sits halfway — not fully on or off. Flip it fully OFF first, then back ON.
Branch B · Breaker Panel
Did Resetting a Breaker Fix It?
✅
Great
A tripped breaker was stopping power to those outlets. You found it and fixed it — well done.
💡 If it trips again
A breaker that keeps tripping means something is overloaded or there's a fault in that circuit. Don't keep resetting it — that's a job for a technician.
Branch B · Next Steps
You've Checked the Main Causes
Your lights working tells us the battery side is at least partly active. Since outlets still don't work after the main checks, this may need a technician to look at it in person.
⚙ Tell the technician
Lights work but outlets don't. You already checked: shore power connection, pedestal breaker, reset outlet (GFCI), inverter, and main breaker. That information saves time and helps them arrive prepared.
Branch C · Step 1 of 3
AC and Microwave Need More Power
AC units and microwaves draw a lot of power. They need a dedicated breaker — and enough amperage from your campsite hookup to run at all.
Why this matters: On a 30-amp connection, running AC alone can use most of your available power. A 50-amp site gives you much more headroom.
Branch C · Step 1
What Amperage Are You Connected To?
Branch C · 30-Amp
30-Amp Has Limits
On 30-amp service, you have roughly 3,600 watts total. A single rooftop AC unit uses 1,500–2,000 watts. Running the AC and microwave together can easily trip the breaker.
01
Turn off other high-draw items first
Electric water heater, second AC, electric heat strip — turn them off before trying the AC or microwave.
02
Check the dedicated breaker for AC
The AC unit usually has its own breaker in the panel — look for one labeled AC, Air, or by roof unit location.
03
Using a 30-to-50 amp adapter?
An adapter doesn't increase power — you're still limited to 30 amps. A 50-amp RV on 30-amp will have reduced capability.
Branch C · 50-Amp
On 50-Amp — Check the Dedicated Breaker
On 50-amp service you have plenty of power for AC and microwave simultaneously. If they're still not working, the issue is likely a tripped breaker or a fault in the appliance itself.
01
Find and reset the AC breaker
In your RV breaker panel — flip it fully off, then back on.
02
Check the thermostat / control panel
Make sure the AC is set to a temperature that requires cooling and the fan is set to AUTO or ON.
Branch C · Next Steps
Likely an Appliance or Circuit Fault
If you've confirmed power is available and the breaker is fine, the issue is likely inside the appliance itself or in the wiring feeding it.
⚙ Before you call a tech
Note: the exact appliance not working, your shore power amperage, whether the appliance makes any sound when you try it, and any error codes on the thermostat or display.
Branch D · Water System
How Are You Getting Water?
RVs can use two different water sources. The checks are different for each — pick the one that applies.
Branch D · City Water
City Water Quick Checks
01
Is the spigot turned on?
The campsite water spigot valve — turn it fully on counterclockwise.
02
Is the hose kinked?
Walk the hose and straighten any kinks. A single kink can stop flow completely.
03
Check your pressure regulator
Most RVers use an inline pressure regulator. If it's failed or clogged, it can block flow entirely. Try removing it temporarily to test.
04
Is your water pump switched off?
When on city water, the pump should be off. But a stuck-open pump bypass valve can sometimes interfere. Check that the pump switch is off.
Branch D · Fresh Tank + Pump
Fresh Tank Quick Checks
01
Is the fresh tank actually filled?
Check the tank monitor panel. A pump running a dry tank will burn out — so this check matters.
02
Is the water pump switched ON?
Look for a pump switch on the control panel — often labeled "Water Pump" or "Pump." It must be on for tank water to work.
03
Do you hear the pump running?
Turn on a faucet and listen. You should hear a brief hum or buzzing when the pump kicks on.
Branch D · Pump Runs, No Flow
Pump Runs But No Water
If the pump runs but nothing comes out, the most likely causes are a dry tank, a closed valve somewhere in the line, or a winterization bypass that wasn't reversed.
💡 Winterization check
If the RV was recently de-winterized, check that all bypass valves are returned to normal position. Pink antifreeze in lines can also cause temporary low flow until it's flushed.
Branch D · No Pump Sound
Pump Isn't Running at All
If you don't hear any pump sound, the pump isn't getting power. This is usually a simple fuse or the pump switch not being engaged.
01
Check the pump fuse
Find the 12V fuse panel and look for a fuse labeled "Water Pump" or "Pump." A blown fuse is cheap and easy to replace.
02
Verify 12V power is on
The pump runs on 12V. Make sure the battery disconnect is on and batteries have charge.
Branch D · Next Steps
Water System Needs Closer Inspection
You've worked through the common causes. At this point the issue may be a failed pump, a closed valve in an unusual location, or a plumbing fault that needs hands-on diagnosis.
⚙ Before you call a tech
Be ready to say: city water or tank, whether the pump runs or not, your water tank level, and whether the RV was recently winterized. This helps a tech arrive prepared.
Branch E · Different Issue
Let's Find a Starting Point
No problem. Start with these three quick checks — they solve more problems than you'd expect.
01
Battery disconnect is ON
Often left off after storage or towing. Check the battery compartment or entry area.
02
Shore power cord is plugged in and pedestal breaker is ON
Confirm the cord is fully seated and the pedestal breaker hasn't tripped.
03
Check your control panel for error codes
Write down any codes you see — they're valuable for diagnosis.
Take a breath — this is usually something simple. We'll check the most common causes step by step.
✅The pump running is actually a good sign — it means power is reaching it.
Water Pump · Step 1 of 4
Is Your Fresh Water Tank Filled?
The pump pulls water from your tank. If the tank is empty, nothing will come out — even if the pump runs perfectly.
Why this matters: Running a pump dry can damage it over time. Always check the tank level first.
Water Pump · Fill First
Fill the Tank and Try Again
Fill your fresh water tank, then turn on a faucet and test again.
💡 Quick tip
After filling, it may take a few seconds for the pump to prime and push water through the lines. Leave the faucet open for 20–30 seconds.
✅
Good News
Empty tank — that's one of the most common causes. You found it quickly.
Water Pump · Step 2 of 4
Does the Pump Run Continuously?
When you open a faucet, listen carefully to the pump. Does it run non-stop without stopping, or does it run briefly then stop?
Why this matters: A pump that runs non-stop usually means it can't build pressure — often air in the lines or a blockage. A pump that won't run at all is a different issue.
Water Pump · Step 3 of 4
Likely Air in the Lines
When air gets trapped in the water lines, the pump runs continuously but can't build pressure to push water out. This is very common after filling an empty tank.
Why this matters: Opening a faucet fully lets the pump push the air out and prime the system with water.
01
Open a faucet fully
Turn the hot and cold on fully and let it run for at least one full minute.
02
Be patient — it may sputter first
You may hear spitting or see bursts of air. That's normal — it's the air being pushed out.
✅
Air Purged — Fixed
Air in the lines is very common after filling a tank or any time the system runs dry. All sorted.
Water Pump · Step 4 of 4
Check the Water Filter
A clogged or blocked inline water filter can restrict flow enough that the pump can't push water through. This is easy to miss.
Why this matters: Even a partially clogged filter can drop pressure to nearly nothing.
Water Pump · Filter Location
What to Look For
The inline water filter is usually near the water pump or along the water line coming from the tank. It's a small canister — often white or clear.
01
Look near the pump
Check around the fresh water pump in the utility bay or under a cabinet.
02
Check if it looks dirty or blocked
If it's visibly discolored or clogged, try bypassing or replacing it temporarily to test.
Water Pump · Filter Check
Did That Fix It?
✅
Clogged Filter Fixed It
A blocked filter was stopping the flow. Replace or clean it — and consider checking it seasonally.
Water Pump · Step 3 of 4
Check the Pump Power
If the pump runs weakly or barely at all, it may not be getting enough power — or the pump switch may not be fully on.
Why this matters: A pump needs solid 12V power to build proper water pressure. A weak connection or blown fuse can cause low or no flow.
Water Pump · Power Check
What to Check
01
Make sure the pump switch is fully ON
Look for a switch labeled "Water Pump" or "Pump" on your control panel. It must be in the ON position.
02
Check the pump fuse
Find your 12V fuse panel and look for a fuse labeled "Water Pump." A blown fuse is cheap and easy to replace.
03
Check battery disconnect is ON
The pump runs on 12V. If the battery disconnect is off, the pump won't get power at all.
Water Pump · Power Check
Did That Fix It?
✅
Power Issue Fixed It
A switch, fuse, or disconnect was cutting power to the pump. Good catch — that's a common and easy fix.
Water Pump · Next Steps
You've Checked the Main Causes
This is likely a deeper issue — a failed pump, a stuck valve, or a plumbing fault that needs hands-on inspection. You've already done more than most RV owners would.
⚙ Tell the technician
Pump runs but no water comes out. You already checked: tank level, air purging, inline filter, pump switch, fuse, and battery disconnect. That saves time on the service call.