Question about Heating & Cooling
Posted by Anonymous on
This is a diagram of a blower relay and a fan motor, the normally closed fan relay switch goes to the low speed which is the Heat speed, the low speed is controllled by a temperature delay depicted in the low speed circuit.
The normally open fan relay switch goes to the high speed, which is the AC modes speed , also if you run the fan continuously via the fan switch on the thermostat this is also to high speed.
I suspect the temperature delay's on setting is being reached thus cycling the low speed of the fan.
Posted on Nov 09, 2015
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Posted on Jan 02, 2017
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