I have a Penguin II heat pump/AC that I am having issues with. My RV is a 2015 and both units have been replaced under warranty.Today it is what I would call short cycling. I can set the temp as low as 65 and it will come on and the compressor will run for awhile then it will go off but the fan keeps running. After awhile the fan will cut off but will start again in just a few seconds and the compressor will start again. This continues over and over and over and it has no bearing on what the inside temp actually is. Eventually the compressor will quit coming on and the fan will run until I turn it off.The coils are clean and I have re-set the thermostat, this is all I know how to do. Any suggestions are appreciated. By the way when the compressor is running the air is cold.Also the heat pump function works as it should. We are using it each morning in Colorado.

BOTH units do the same or only one? I would suspect a bad FREEZE Thermister. Doug

Only one having issues and of course it is the one in the main cabin that does all the work.I thought it might be freezing up but it is not. I got up on the roof and checked.If it was a bad thermistor wouldn't it freeze up in HP mode when it is 40 degrees?

I would be looking at the control system.Make and model of the thermostat?Are they hard wired or wireless?

Thermostat is wired Dometic model 3314080 ten button.

Has anyone reset the thermostat?Manual from BryantRV

AC problems again | Good Sam Community

enblethen
Nomad
Sep 02, 2019
Even if they come with new boards they still need to be set up.
I didn't see whether this is same issue as you had with original AC units that were replaced.
dougrainer
Nomad
Sep 02, 2019
enblethen wrote:
Even if they come with new boards they still need to be set up.
I didn't see whether this is same issue as you had with original AC units that were replaced.

Yes and no on set up. Zone 1 is a default and will be the front unit. Zone 2 MUST be set and will be bedroom. If Zones NOT set up, then the system will not function at all. So, his zones are set correct. The ONLY other set up that he would need is to tell it has a furnace. But if not switched to furnace it would have no bearing on his Cool operation. Doug
12th_Man_Fan
Explorer
Sep 02, 2019
Both AC's had worked just fine B4 I left Texas. This was a new problem that developed while in Colorado high altitude. Sorry I didn't clarify that sooner.

I switched the sensors this morning and as soon as I turned on the front AC on which was the unit I put the bad sensor in gave me an E5 error which is open ckt or out of range freeze sensor. So far the back unit is working as it should.

I pulled the bad sensor out again and sure enough it was open ckt when I checked it with a VOM meter. I wish I had checked it before I sent to the trouble of installing it in the front unit.

New sensor on order.

Thanks everyone for you help. I know just enough to be dangerous on things like this.

I am getting too old for this kind of stuff. Four trips to the roof! Yuck.
enblethen
Nomad
Sep 02, 2019
Let us know on this post as what happens!
12th_Man_Fan
Explorer
Sep 03, 2019
Well the AC worked all day with no issues so the problem was the freeze thermister.

Thanks all for your help.
enblethen
Nomad
Sep 03, 2019
Thanks for the update!

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