First, the quick answer: check that the fridge is level, give it 8-12 hours to cool from warm, make sure the outside vents aren't blocked, and test it on both propane and electric. If it cools on one power source but not the other, the cooling unit is fine and the fix is usually simple. If it won't cool on *either*, the cooling unit itself may be failing - that's the expensive one, and it's worth a diagnosis before you buy a new fridge.
RV fridges aren't like your kitchen fridge
Most camper refrigerators are absorption fridges - no compressor. They use a heat source (a propane flame or an electric element) to drive an ammonia solution through a sealed cooling unit. Two things follow from that design:
- They must be level to work. Run one badly off-level for long and the solution stops circulating - do it repeatedly and you can permanently damage the cooling unit.
- They cool slowly. Cold air isn't blown in; heat is slowly absorbed out. Precool the fridge the night before a trip and load it with cold food.
The checks you can do yourself
- Level the rig. Even a couple degrees matters over time.
- Feel the back. Behind the outside access panel, the works should be warm when running. Stone cold on both power sources means no heat is being applied - often a fuse, igniter, or element problem.
- Check the vents. The fridge dumps heat through the outside sidewall vents. Mud dauber nests and leaves in there wreck performance, especially on 90-degree days.
- Watch for the ammonia signs. A rotten-egg smell inside the fridge or yellow powder residue at the back means the cooling unit has leaked. Stop running it and call.
- Propane-only failure? If it works on electric but not gas, think burner or igniter - dirty burners are a routine fix for us.
Fix or replace?
Here's the honest math. If the problem is the igniter, thermistor, element, control board, or burner - fix it, easily. If the cooling unit is dead, you're choosing between a replacement cooling unit, a new absorption fridge, or converting to a 12V compressor fridge (which doesn't care about level and cools fast, but changes your battery needs). We've done all three and will tell you straight which makes sense for your rig and how you camp.
Most fridge calls are mobile calls
Fridge diagnosis and most repairs happen right where your camper is parked - we cover about 100 miles around Roscoe, including Aberdeen, Ipswich, Redfield, and Mobridge. Cooling unit swaps typically come into the shop.
RV fridge FAQ
How long should an RV fridge take to get cold? 8-12 hours empty. Plug it in the day before you leave.
Can I run it while towing? Many folks run propane while towing; some prefer not to. Either way, turn it off at fuel stops.
Fridge works but freezes everything? Usually a thermistor problem - a cheap fix, don't live with it.