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Old 07-30-2009, 08:35 AM   #1
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Dometic a/c problem

Hello

Has anyone had this problem with a dometic rooftop unit? Turn a/c on set temp the cooler you set it the less time compressor runs. The thermostat flashes temp then a/c. Not sure what to try. any info would be greatly appriciated
Thanks
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Old 07-30-2009, 09:14 AM   #2
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Quote:
Originally Posted by snl2106 View Post
Hello

Turn a/c on set temp the cooler you set it the less time compressor runs.
Thanks
It does what????

Setting a t'stat lower will not make the run runn any faster or cool faster.

Ken
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Old 07-30-2009, 09:18 AM   #3
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Maybe I didnt explain correctly. The compressor wont run as long a period before not coming on after a cycle. I understand it doesnt make it blow harder or cooler. I do hvac her at my shop for autos. Rooftops are something new to me. But I do thank you for your reply
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Old 07-30-2009, 09:32 AM   #4
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If you have this control the number that you input on display,set to cool, will be what the AC try for. There will be a delay before compressor will come on than it will also cycle on and off until it reaches temp that you set on display.
There is a sensor within the control and in your bedroom there will be a white bubble sensor on the wall for that AC.
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Old 07-30-2009, 12:03 PM   #5
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I have an older coach. 1990. I have a digital display whenthe a/c compressor cycles off it will not go back on and is when the a/c flashes. Guess I should have been a bit more forward with that info. DUH is a day lol thanks again
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Old 07-30-2009, 12:17 PM   #6
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In general the thermostats supplied with the RV by the manufacturers are pretty poor on repeatibility. The last couple of RV's we have had, I replaced the standard t'stat with a Hunter from Walmart fro less than $25.00. They work great.

Has the unit possibly frozen the coil whe you try to run it longet anf it has to defrost a bit before it can restart. Are both the condenser and evaporatror coil clean?

Ken
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