Troubleshoot

Fridge / propane basics (safety-first)

A warm fridge or an LP appliance that won’t stay lit is usually supply, mode select, level, 12V control, or ventilation — not a reason to defeat safety gear. Know whether you have an absorption fridge or a residential compressor fridge before you chase the wrong path. Prefer Text when smell, soot, or ammonia enters the picture.

Safety first: If you smell gas, hear a hiss you can’t locate, or suspect a leak — shut off LP at the tank, ventilate, no sparks/flames/cigarettes, Prefer Text or emergency services as appropriate. Do not “sniff test” with a flame. Never bypass LP safety devices (gas valves, thermocouples, ESO / flame-sense).

Symptoms

Absorption fridge warm on LP, electric, or both
Fridge clicks / tries to light; sparker ticks with no flame
Fridge cools on electric but not LP (or the reverse)
Tank shows gas but appliances won’t stay lit / won’t light
Yellow sooting flame, scorched cabinet, or heat damage behind the fridge
Error codes on a residential 12V / inverter-fed compressor fridge (different animal)
Related LP symptoms on furnace or water heater (cross-check supply — don’t duplicate a full furnace essay here)
12V control fuse blown; display dark; board dead
Coach not level; absorption performance collapses on a slope

Quick checks (owner-safe)

Smell check first. Any LP odor → tank OFF, ventilate, no flames, Prefer Text / emergency as needed. Stop this list.
Confirm LP tank valve is open. If safe and outdoors-aware, a brief stove-burner check can confirm supply — then shut off if you’re diagnosing leaks. Do not leave unattended burners on as a “test.”
Fridge mode select: LP vs electric vs auto. On electric, verify shore or inverter power is actually present.
Level the coach — absorption fridges need level within OEM limits. A slope that feels fine for sleeping can still kill cooling.
Confirm 12V control power at the fridge (blown control fuse is common). Panel lights / board dead → fuse and wiring before LP parts.
Clean/inspect only what OEM allows without deep disassembly. Don’t bend thermocouples or “adjust” valves casually.
Residential compressor units: verify 12V or inverter supply, vent clearances, and error-code meaning per OEM — do not apply absorption LP lighting steps to a compressor fridge.

When to stop DIY

Any LP smell or suspected leak
Yellow sooting flames, scorched cabinet wood, or melted plastic behind the fridge
Bypass of gas valves, thermocouples, flame sensors, or ESO devices — never
Ammonia / chemical refrigerant odor from an absorption cooling unit (cooling unit failure — not a DIY recharge)
Roof vent / chimney work you’re not equipped for; flue blockage you’re guessing at
Opening sealed cooling-unit plumbing or torch work on the absorption loop
Furnace / water heater flame roll-out, CO alarm events, or repeated flame failure after basic supply checks — Prefer Text

What UMRT diagnoses

LP-aware appliance diagnosis with safety first. We separate tank/regulator delivery problems from appliance-level failures, and we treat absorption vs residential compressor as different systems.

LP delivery vs appliance-level failure (manometer / leak-check practices — no cowboy soaping of unknown fittings without a trained process)
Absorption cooling unit vs control board vs igniter / electrode
12V control path and electric heating-element path on dual-mode units
Ventilation, baffle, and heat-rejection issues that look like “bad fridge”
Dometic-aware service posture — Dometic Professional Certified — without overclaiming every sub-brand or every residential compressor badge
Related LP appliances (furnace / water heater) when the fridge is a symptom of a supply problem

Trip fee quoted before we roll. Diagnostic $150 applied if you proceed. Labor ~$150/hr. Corridor: MT · WY · ID · WA.

Safety first (leak / smell / sooting)

Non-negotiable owner rules:

Smell gas → shut tank valve, ventilate high and low as practical, extinguish pilots/flames, no switch-flicking in the smell zone, Prefer Text or emergency services.
Never bypass LP safety devices to “get cold food through the weekend.”
Sooting / yellow flame / scorched cavity → shut down, Prefer Text. Incomplete combustion and heat damage are fire and CO territory.
Soap-bubble checks on fittings you understand can be part of careful leak finding — flame sniffing is not. If you’re unsure what you’re looking at, stop.
CO / LP alarms that chirp or alarm: treat as real until proven otherwise. Ventilate and get help.

Absorption vs residential compressor — know which you have

| | Absorption (classic RV) | Residential compressor | | --- | --- | --- | | How it cools | Heat (LP flame and/or electric element) drives an ammonia absorption cycle | Compressor + refrigerant (like home fridge), usually 120V or 12V compressor | | Needs level? | Yes — within OEM angle limits | Far more tolerant of modest off-level | | LP involved? | Often (dual/tri-mode) | Usually no LP on the fridge itself | | Common fails | Board, igniter, element, cooling unit, vents, level, 12V control | Power supply, inverter overload, vents, compressor/OEM fault codes | | DIY recharge? | No — cooling unit replace, not “add gas” | No — sealed system / OEM service |

If your “fridge” is a residential unit on an inverter, LP lighting checklists waste time. If it’s absorption, compressor-fridge YouTube steps waste time. Read the model label on the fridge skin or inside the door.

Electric path checks (absorption dual-mode)

Mode set to Electric or Auto with shore present.
Coach outlet / fridge breaker live; EMS not rejecting shore (inverter / shore faults, no power).
Heating element path: no heat on electric with 12V board alive often means element or relay/board — confirm with proper testing, don’t swap boards on a guess.
Auto mode that “won’t choose” electric may be a sensing / priority setting — check OEM sequence before parts.

LP path checks (no safety bypasses)

Tank open, enough fuel, regulator breathing. Empty Auto-changeover bottles and tripped changeover valves fool people weekly.
Other LP appliances: if the stove won’t light either, fix supply before condemning the fridge. If the stove is fine and only the fridge fails, lean appliance-side (igniter, orifice, valve, board) — still no bypasses.
Spark electrode gap/cleanliness per OEM; cracked ceramic electrodes fail to light.
Flame sense / thermocouple / ESO must prove flame. Jumping them is how coaches burn.
After travel: spiders and debris in LP flues/burner tubes are classic — accessible cleaning only within OEM guidance; don’t shove wire into unknown passages blindly.

For broader LP system context: LP gas troubleshooting.

Level, ventilation, and heat-rejection

Absorption needs level. Use a real level on the freezer floor or per OEM — bubble levels on the counter can lie.
Rear roof vent and side vent path must be clear. Blocked vents = heat stays in the coil / boiler area = poor or no cooling and heat damage risk.
Summer: parking with the fridge side in full sun plus blocked vents is a common “sudden warm fridge” story.
Baffles and door seals matter. A failed cooling unit often presents as warm box with heat at the boiler / ammonia smell — Prefer Text; don’t try to “recharge.”

Residential compressor fridge path (short)

Confirm dedicated power: inverter sizing, shore pass-through, and that the fridge circuit isn’t dropping on low battery cutout.
Clear condenser airflow; dust blankets kill compressor fridges quietly.
Read the OEM error code — capture it before power-cycling clears the clue.
Door seal and temperature setpoint basics before “bad compressor” claims.
Ties to electrical pages when the inverter is the weak link: 12V no-charge, inverter / shore faults.

Related LP appliances (furnace / water heater)

If multiple LP appliances fail together, think tank, regulator, changeover, and main LP delivery before three separate appliance replacements.

Furnace: RV furnace troubleshooting
Water heater: Water heater troubleshooting
Same safety rules: smell → shut tank, ventilate, no flames; no safety bypasses.

Cooling unit failure signs (absorption)

Box warm; boiler area unusually hot; possible ammonia / chemical odor.
Yellow residue or oily film near cooling-unit seams (not definitive alone — context matters).
Unit ran off-level for extended time — classic cooling-unit stress story.
Cooling units are replace (or fridge replace) events — not DIY recharge. Prefer Text for confirm + options.

12V control board and fuse map

Locate the fridge control fuse on the coach panel and any inline fuses at the unit. Dark display + dead sparker often ends at a fuse or ground.
Aftermarket solar / inverter noise rarely “fixes” a fridge — chase power quality only after basics.
Board replacement without proving igniter, element, and LP valve is a common parts-roulette failure — meter first when safe.

Seasonal and altitude notes

High altitude: some LP appliances need orifice / OEM guidance; don’t drill orifices as a field hack.
First cool nights of the season after summer storage: spiders in burners/flues — inspect accessibly, don’t leave sooting unattended.
Storage: fridges left sealed wet grow mold; doors ajar with power off is owner maintenance, not a service call.

Book a diagnostic

Smell, soot, ammonia, or a fridge that’s warm after level/mode/fuse basics — Prefer Text. Safety over saving a service call.

Prefer Text (616) 606-5277 · Book a Service · trip fee quoted before roll · diagnostic $150 applied if proceed

Pricing: trip $75/30 mi then $1.50/mi · labor ~$150/hr · diagnostic $150 applied. Credentials (text): Victron Professional Certified Installer · weBoost Authorized Installer · Peplink Certified Associate · Dometic Professional Certified · Starlink install capability. Corridor: MT · WY · ID · WA.

Related guides

Next step

Book a Service

Prefer Text — (616) 606-5277. Trip fee quoted upfront before we roll.

Book Now Text / Call