I have a Trane compressor outside. The unit comes on and the interior blower comes on for a few hours and then stops blowing. I tried to turn on the fan via the thrmostat and it does not work when it shuts down but otherwise works fine so its not a wiring problem. The outside unit continues to work.

I replaced the interior blower motor as I thought the thermal protection was defective. The problem remains.

If I shut off the exterior unit and interior unit via the main circuit breaker and leave it off for a few hours everything works fine.

The fan blower works fine in heating mode.

Is there a fan blower control in the condenser that controls the interior blower? There are two wires coming from the condenser to the control box on the furnace.

Thanks,

Richard