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I have a mastercool p225102a controller - everything works at the test buttons. The fuse is good but motor will not run even though the thermostat is supplying power to the fan terminal.

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SOURCE: Need a wiring diagram for mastercool evap 2 stage unit

I have the wiring diagram in the cooler. I can photograph and send it to you. Do you still need it?

Posted on Jun 06, 2009

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1 Answer

Motor only runs when i hold down the test button


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Click Here for a very good source of information on Maytag dryers

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My Master Stat Controller (CC2000A Rev 2003) was in 2 parts. The Thermostat unit in the house and the Power Control unit in the Cooler. The power Control unit was mounted on the squirrel cage fan housing so it vibrated some when running. That means the components vibrated slightly with respect to the PC board. Especially the larger components. My first symptom - Intermittent failure to turn the water pump on. I could see a faint crack in the solder around the pin of a relay on the PC board. Re soldering the PC pins solved that problem. Later, the second symptom was quicker than usual on-off cycling of the fan. I re-soldered all the pins on the PC board and all problems subsided. A better mounting place for the Power Control Unit would be good, but outside of the cooler might be a thermal problem here in the hot desert south west.

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My gas dryer burner does not heat. The igniter does not glow even to permit the gas valve to turn on. Everything else works and checks out being good, such as the thermostats, igniter, flame sensor. ...


You could check the igniter by testing to see if 120 volts is at the wiring the igniter plugs into, if 120 vac at that plug the igniter is bad Also need to check THERMAL FUSE,in addation to thermostat,on electric dryers if thermal fuse is out it cuts circuit to motor, on many brand dryers if thermal fuse bad on GAS dryer it cuts circuit to igniter

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Our mastercool thermostat does not have any power going to it whatsoever. It is only a 3 year old unit and we have checked all the fuses and wiring which all seem to be fine. We even changed the main...


If it's a 24 volt thermostat, the inline transformer has failed and needs to be replaced. Some are 18 volts, and they require a transformer too. I suspect that's the problem, since the T-Stat is not getting power.

Hope this helps you solve the problem. Please let me know. Thanks.

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1 Answer

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