On Tuesday, June 5, 2018 at 10:49:16 AM UTC-4, wrote:
On Monday, June 4, 2018 at 10:23:58 PM UTC-4, trader_4 wrote:
On Monday, June 4, 2018 at 6:34:51 PM UTC-4, Scott Frederick wrote:
Thanks for the information. It's been 26 hours of functioning correctly.
It's a Goodman GPH1336H41AC all-in-one heatpump package unit for a cabin.
No condenser fan or compressor operation when acting up. Just the air handler fan.
Seems to be one of three things: thermostat, contacter, or transformer.
So I got my multimeter and I'm waiting for it to fail again.

I think you can probably rule out the thermostat. The thermostat only
calls for cooling, the air handler is turned on by the controller board.
The thermostat can turn the air handler on separately, if you want fan
only, but in cooling mode it's turned on by the system. So, if the air
handler is running, I'd check to see if the contactor has 240V on either
side and if it has it's 24V turn on voltage.

yep, unlike what I said before I would rule OUT the compressor run capacitor if you say BOTH the compressor and condenser fans fail to run.

m

That's a good point too. If he can watch it as it happens, the sequence
can be probative too. For example, if the fan is intermittent, the fan
could stop, which then causes the coil to get too hot and then the
compressor safety stops the compressor shortly after. They both wind
up off, but how they got there is important.

That was happening on my Rheem system that was only two years old.
It had one of those fancy new ECM condenser fan motors. You know,
the ones that cost 4x what a regular motor costs and save you $3
a season in electricity? I replaced it with a regular motor for $90.
But that's what it was doing, the fan motor would stop, then the
compressor would trip off.