Gas and Oil Home Heating Furnaces - heat pump doesn't work

I have a Lenox heat pump and it wasn't working. I have replaced the transformer and now the fan is running but no cold air. The outside unit is not running. I manually pressed in the relay and the compressor came on and when I let off of the relay the compressor went off. What else could be causing the heat pump to not work and cool. Any suggestions would be very helpful.

Thanks
Wolffman:confused:

We know that your transformer works and provides control voltage because the indoor fan works.

We also know that the outdoor unit has power because it also does run.

Most Lennox products have a manual high pressure switch somewhere. Look for it and push the reset button on general principles.

The control circuit to the compressor contactor is open OR the contactor operating coil is open. If you have a voltage tester, test the contactor coil terminals for power (with the stat calling for cooling). If you have 24 volts AC at the coil, your contactor needs to be replaced.

I don't believe that you have 2 unrelated problems. A failed contactor coil often burns out the transformer as it dies.

Thanks Lynn!!!

I'll check the voltage and the contactor and I appreciate the information. I'll let you know how it works.


Thanks again!!:)

Wolffman