Heat Pumps and Electric Heating - problem with HEAT PUMP

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pciren
11-06-08, 08:52 PM
when I put on the thermostat of fan to on, no fan at all.
When I put on auto, and put thermostat on heat, the outside unit is runnnig, but fan not comes up, THEN AFTER A WHILE, THE OUTSIDE UNIT STOPS, NO HEAT AT ALL. bUT, IF THE AUXILARY (EMERGENCY) HEAT COMES ON THEN THE FAN STARTS, AND HEAT COMES UP.. any idea...?

thanks

Jay11J
11-09-08, 06:19 AM
Sounds like something is wrong with the main blower in your air handler.

it can either be a bad motor, or control, or relay.

Do you have a meter to take some reading for us?
pciren
11-09-08, 09:02 AM
thanks for your reply. Could you please let mw know what should I measure....thanks?

Jay11J
11-09-08, 06:04 PM
At the air handler, we need to take a low voltage reading between G and C with the t-stat switch to fan ON.

if you are reading 24 volts, then we know the t-stat is working and wire is OK.

Then we need to take a line voltage reading at the relay/control where the blower motor hooks up to.

If you are getting a reading, then it's the motor.

Will need make and model of your air handler.
Ed Imeduc
11-10-08, 02:20 PM
Might try Jump R to G at the stat. should get blower if not then check the fan relay. If it runs then it can be in the stat