Just after any thoughts on this one.
I have an aging "box" type 2hp air conditioner that I'm planning to
in a few months with a split system. It's about 20 years old so it's
If powered up cold it cools ok but when the thermostat cuts the
it fails to restart it several minutes later. You can hear a brief hum
accompanied by the fan slowing a little at it tries to start the
It gives up and tries again at intervals without success. Might get
half an hour later though.
Reading here and there, the general concensus may be an AC capacitor
the compressor may be failing or even the compressor itself but bear in
it runs fine from a cold start and continues to run just fine until
first thermostat cycle.
I had a thought of cutting off the temperature sensor sitting in front
the evaporator and measuring it's "hot day" resistance ( yes it's an
electronic temperature control) then selecting and replacing it with a
suitable fixed resistor. This theroretically will make the compressor
continuously but at least give us some cool time when we need it and
usable until we throw it out.
Any thoughts on my logic here ?