RV refrigerator not cooling: what to check and what the repair costs

An RV absorption refrigerator that has stopped cooling in Sebring is usually a $250 to $700 repair: a board, an element, an igniter, a burner cleaning, or a ventilation fix. The expensive case is a leaked cooling unit, which cannot be recharged and usually means a new refrigerator. The diagnosis tells you which, and it comes before any quote. Trip fee $75 to $150.

Check this first (fifteen minutes)

Is the rig level? Absorption fridges circulate a fluid by heat and gravity, and they stop working properly when the rig is off level. A resort site that has settled over a winter, or a fish-camp site on soft ground, is enough. Check a bubble level on the freezer floor.
Which power source fails? Try shore power (AC mode) and gas separately. Fails on both: thermostat, board, or the cooling unit. Fails on AC only: heating element or its relay. Fails on gas only: burner, igniter, flame sensor, or gas valve.
Feel the back of the unit. Open the outside lower vent. After twenty minutes of running, the boiler section at the bottom should be too hot to touch. Cold boiler on both sources means nothing is heating it: board or thermostat. Hot boiler and no cooling means the cooling unit.
Look for yellow. A yellow-green powdery residue on the tubing at the back, or an ammonia smell, is a cooling unit leak. Stop there; that is the answer.
Check the airflow path. Look up the chimney behind the fridge from the lower vent. Wasp nests, leaves, and insulation that has slumped block it. A fridge that cannot shed heat out the top vent cannot cool the box.
Check the burner tube on gas. A mud dauber nest, rust, or spider web in the burner is the most common gas-side find after a rig has sat through a wet summer.

What is usually wrong

What you observe	Likely cause	Fix and cost
Nothing on either source, no lights	12V supply, fuse, or control board	Fuse, or board $250 to $500
Works on gas, not on shore power	Heating element or relay	$250 to $450
Works on shore power, not on gas	Burner, igniter, or flame sensor	$250 to $450
Cools at night, warm by afternoon	Ventilation or ambient heat	Vent clean, fan install, $200 to $400
Freezer cold, fridge warm	Thermistor, door seal, or airflow inside the box	$150 to $350
Boiler hot, no cooling, yellow residue	Cooling unit leaked	Replacement refrigerator, quoted after inspection
Fridge quit the day after a storm	Control board killed by a surge	Board $250 to $700, and we test the converter too

These match the pricing page on top of the trip fee and $125 to $190 hourly labor.

Why absorption fridges struggle here

An absorption refrigerator has no compressor. It heats a solution of ammonia and water in a boiler, either with a propane flame or a 120V element, drives the ammonia around a sealed loop, and the evaporation of that ammonia inside the box is what makes cold. Two things follow from that.

It is heat-limited. The loop rejects heat out the back of the fridge, up a chimney, and out the roof vent. The hotter the air behind the fridge, the less cold it can make. Sebring’s average July high is 91.4°F, and the wall of a rig with the sun on it is hotter than that. A fridge that was fine in April and warm by two in the afternoon in July is not broken; it is at its design limit, and the fix is ventilation: a clear chimney, a small fan pushing air up it, and shade on that wall if you can get it.

It hates being off level. The fluid has to flow by gravity through the loop. Off level, it pools, the boiler overheats, and a fridge run that way for long enough damages the cooling unit permanently. Resort sites settle over a season; check the level in November and again in spring.

The wet season adds the gas-side problems. From June to September the burner tube is a warm, damp, sheltered cavity, which is exactly what mud daubers and spiders want. A rig that sat in storage through the summer comes out in November with a nest in the burner, no flame, and an owner braced for a $2,000 refrigerator. It is a cleaning.

And lightning. Florida leads the country in lightning density, and the refrigerator control board is the third thing a pedestal surge kills, after the converter and the AC board. If the fridge died the day after a storm, that is what happened, and we test all three on the same visit.

Repair or replace

Repair when it is a board, an element, an igniter, a burner cleaning, a thermistor, or ventilation, which covers most calls. Replace when the cooling unit has leaked, or when a fridge over about fifteen years old needs a second expensive part. We give you both numbers. The Norcold and Dometic page covers what fails first on each and what replacement runs.

When to call

Now if the food is at risk and a cooler is not an option. Before you leave for the summer if the fridge has been marginal, because a fridge that struggles in April is going to lose a freezer full of food in July. We work on site across Sebring, Avon Park, Lake Placid, and the Lorida fish camps, and the appliance repair page covers the rest of what we do inside the rig.

Frequently Asked Questions

How much does RV refrigerator repair cost in Sebring?

$250 to $700 for the common repairs: control board, heating element, igniter, thermistor, burner cleaning, or fixing the ventilation behind the unit. A failed cooling unit is the expensive case, and on an older fridge it usually means replacing the refrigerator, which we quote separately after diagnosis.

My fridge works on shore power but not on gas. What is that?

The gas side has its own parts: the burner, the igniter, the thermocouple or flame sensor, and the gas valve. After a wet Florida summer the usual find is a mud dauber nest or rust flakes in the burner tube. It is a cleaning and maybe an igniter, $250 to $450, not a new fridge.

It cools at night but not in the afternoon. Is it dying?

Probably not. An absorption fridge loses capacity as the air behind it gets hotter, and on a 92-degree Highlands County afternoon with the sun on that wall it is at its limit. Check the vents behind the fridge for a blocked airflow path and consider a small fan in the upper vent. If it also has a yellow stain or an ammonia smell, that is the cooling unit.

Is a yellow stain behind the fridge serious?

Yes. Yellow residue or an ammonia smell at the back of the unit means the sealed cooling unit has leaked. It cannot be recharged. On most rigs the honest answer is a replacement fridge, and we will say so rather than sell you a board.