I have a new Monte Vista 5th wheel,one month old. The ac frooze up, it was in the low 90 and moderate humitity. How can you prevent this from happening.We travel with our dogs and I'm afraid to leave them in the unit.
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Hello, if the line is freezing there is either a airflow problem or low refrigerant charge. If there is a loud noise most likey the bearings on the motor or the blower wheel is bad and causing a lower amount of air passing over the evaporator coil and thus the freezing of the suction line.
The rule of thumb is 20F difference (lower) than ambient temperature. Most manufacturers will tell you 20 F degress is about normal. In your case it does sound a little warm, but I need to ask, sorry. Was it working o.k. before in same basic temperatures? Have you cleaned coils & fins good on Evaporator & condenser recently? Have you removed filter inside & cleaned it as well, and looked to see if coils are frosting up by chance? Is this a ducted or non ducted system? I'm guessing on a 5th wheel, it is ducted, so make sure you have good discharge on all of those as well. Any blockage or restriction on the discharge side will also cause the problem. Keep me posted on what you find.
Can you give me model #'s of thermostat & AC unit, as well as upper unit? Number of or at least a description of thermostat, and numbers for ceiling assy should be visible when filter taken off, as well as # for upper unit should be tagged on bottom of unit on roof.
make sure the system switch is in the cool position, then press run program button and allow a couple of minutes for system to cycle on, if it doesn't come on press the button for lowering the set point, set it to 72 degrees and then press the hold temperature key.
It has been suggested to us we change out the thermostat.Good idea considering if the ifs its reading colder than actually appears on readout the unit will freeze up. The unit is working right at this moment, but, when we change thermostats we will let you know the outcome.
It could be a relay for the compressor is sticking in the run position. If it is only about one week old take it back to the dealer for service or call them and tell them your problem. This should be covered by warranty and the dealer can refer you to someone authorized to do the work.