RV Refrigerator Repair

Keeping your food cold on Florida's Treasure Coast

An RV refrigerator that stops working in Jensen Beach isn't just an inconvenience. When it's 93 degrees outside and you're 45 minutes from the nearest grocery store, losing your fridge means losing a cooler full of food and scrambling for ice. The good news is that most RV fridge problems are fixable on-site, often in a single visit, and for a lot less than you'd expect.

Scott Marlins has been repairing RV refrigerators across Jensen Beach and Martin County for over 10 years. He's worked on everything from the 4-cubic-foot Dometic units in small travel trailers to the 12-cubic-foot residential-style fridges in luxury Class A coaches. After 3,200+ total repairs, there aren't many fridge problems he hasn't seen at least a dozen times.

How RV refrigerators work (and why they're different from home fridges)

Most RV refrigerators are absorption-type units, and they work on a completely different principle than your home fridge. Instead of a compressor pushing refrigerant through a mechanical cycle, absorption fridges use heat to drive a chemical reaction between ammonia, water, and hydrogen gas. The heat comes from either a propane burner or an electric heating element, and gravity moves the solution through the system. There are no moving parts.

This design has been standard in RVs since the 1960s because it runs on propane (no electrical connection needed) and operates silently. The tradeoff is that absorption fridges cool more slowly, work less efficiently in extreme heat, and need to be reasonably level to circulate the ammonia solution properly.

Newer and higher-end RVs sometimes use compressor fridges that work like residential models. These are more efficient, cool faster, and don't care about being level. But they require 12V or 120V power at all times, which means you need a generator or substantial battery bank to run them off-grid.

Common RV refrigerator problems we fix

Fridge not cooling at all. This is the most common call we get. If the fridge isn't cooling on either propane or electric, the issue is usually the control board (it manages the entire cooling cycle), the thermistor (the temperature sensor that tells the board when to heat and when to stop), or the cooling unit itself if the fridge is older than 12 to 15 years.

Cools on electric but not propane. When the electric side works but propane doesn't, the problem is isolated to the propane burner assembly. A clogged orifice, failed thermocouple, or faulty gas valve prevents the propane from igniting or staying lit. Spiders love to build webs in burner assemblies during storage, and even a small web can block the tiny orifice opening. This repair usually runs $100 to $200.

Fridge is warm but the freezer still works. This is a classic sign that the cooling unit is losing efficiency. The freezer compartment is closest to the cooling coils, so it stays cold longest as the system weakens. It can also be a failed baffle or thermistor that isn't directing cold air properly between compartments.

Yellow residue on the back of the fridge. If you see a yellow, crystalline substance on the cooling unit at the back of your fridge, that's sodium chromate from inside the cooling unit. It means the sealed system has developed a leak, and the cooling unit needs to be replaced. There's no way to patch this type of leak.

Ammonia smell. Turn the fridge off immediately. An ammonia odor means the cooling unit has a crack or leak in the sealed system. Ventilate the area and call us. The cooling unit needs replacement, and there's no repair that'll fix a leaking sealed system.

Why Jensen Beach heat makes RV fridges work harder

Absorption refrigerators have a dirty little secret: they struggle in extreme heat. These fridges work by rejecting heat from the cooling unit into the surrounding air. When that surrounding air is 95 degrees (which Jensen Beach sees regularly from June through September), the temperature differential shrinks and the fridge can't cool as effectively.

Here's what happens in numbers. An absorption fridge can typically maintain about 40 to 45 degrees below ambient temperature. In a 75-degree environment, your fridge interior sits at 30 to 35 degrees. Perfect. But when ambient temperature hits 95 degrees, the fridge interior climbs to 50 to 55 degrees. That's not cold enough to keep food safe long-term.

This is why we see a spike in RV fridge service calls every summer. The fridge isn't necessarily broken. It's just overwhelmed by the heat. There are a few things that help: installing a fan behind the fridge to improve ventilation, making sure the roof vent above the fridge is clear, and adding shade to the side of the RV where the fridge vents are located. We can install auxiliary fans during a service visit for about $75 to $125.

Brands and models we service

We work on every RV refrigerator brand, but these are the ones we see most in Jensen Beach.

Dometic is the most common brand in RVs made in the last 20 years. Their RM series (RM2652, RM2852, RM3962) and DM series are in thousands of RVs across Martin County. Common failures include control board issues, thermistor failures, and heating element burnout.

Norcold is the other major absorption fridge manufacturer. Their N series (N611, N811, N641) and Polar series are widespread. Norcold fridges are subject to a well-known recall affecting certain models for potential fire hazards. If you have a Norcold fridge, we can check whether your model is affected and install the recall kit if needed.

Residential-style fridges from Samsung, Whirlpool, and others are becoming more common in newer RVs. These are standard compressor fridges adapted for RV use. They're more efficient but require different repair skills than absorption units. We handle both.

Our diagnostic process

RV fridge problems can be tricky to diagnose because a warm fridge could have five different causes. We follow a systematic process to find the actual problem.

First, we check the basics: power supply (both 120V and 12V), propane pressure, and the control board status lights. Then we measure the temperature at the cooling fins to determine whether the system is producing any cooling at all. We test the heating element resistance, check the thermistor readings, and inspect the burner assembly for propane operation. For suspected cooling unit failures, we check the back of the unit for leaks, sodium chromate deposits, and ammonia odor.

The whole diagnosis takes 20 to 30 minutes, and you'll have a clear answer and a firm repair quote before we do anything.

Need your RV fridge fixed? Call Scott at 772-356-0328 for mobile service anywhere in Jensen Beach, Stuart, Palm City, or Martin County.