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Old 09-21-2021, 04:45 PM   #1
Alpine03's Avatar
Join Date: May 2017
Location: San Diego
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Angry Air conditioners not operating correctly

It seens my thermosats are not turning the air conditioners on and off at the correct temperatures. I need to set them allot lower to have them come on and set the allot higher to get them to turn off. I beleive they are both 15K btu heat pumps. Due-Therm Control Center 3109228.001 and heat pumps Duo-Therm 630516.321.
2003 34' FDDS
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Old 09-21-2021, 05:39 PM   #2
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Where is the sensor for the thermostat?
2006 Damon Daybreak 3276 35'with 5 Star Tuner. 3 200 Amp Lithium batteries and 2000 watt PSW inverter/charger. 2013 Elantra on a Master Tow dolly.
Retired AF
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Old 09-21-2021, 08:42 PM   #3
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Location: Modesto, CA
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Look into a new MicroAire T-Stat. Easy to install and set up. Blu Tooth and WiFi capable. Solved my similar problem.
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Old 09-21-2021, 08:45 PM   #4
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Location: Capistrano Beach, California
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Originally Posted by HarryStone View Post
Where is the sensor for the thermostat?
Yep, this^^.

The thermostat is not the location of the sensors that control the cycling of the a/c. The front sensor for the front a/c is located above the driver side window in the cabinet frame. The rear sensor is in the bedroom, probably in the drawer cabinet frame. These two sensors determine when the separate a/cs cycle.

What you describe is normal. Front area is harder to cool and maintain temp because of the windshield and location of the sensor. Rear generally is cooler because of smaller area and no single pane glass windows.
Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.
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Old 09-21-2021, 11:56 PM   #5
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My thermostat temperature sensors are mounted at the front edge of the discharge air grill on both the front and rear systems. Replacing the antiquated Coleman T Stat with the new Micro Aire solved my issues. Nothing was wrong with the existing sensors. If you are in doubt, you need to determine if a signal is going to your existing T Stat to energize the compressor start circuit (start capacitor). Good luck!
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Old 09-22-2021, 04:29 PM   #6
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Location: Sonora, CA
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I have the same problem. I replaced my stock thermostat with a Micro-Air Easy Touch RV. Did not solve my problem. I was hoping you could calibrate the Micro-Air. Nope. I've learned what to set the temperatures to maintain a comfort level and I live with it. I am really happy with the Micro-Air in that I can control it with my cell phone, etc.
2001 Alpine Coach 36'
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air, air conditioner

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