HVAC/Nest Thermostat help

tonyride

Don't piss off the red guy
Any HVAC professionals in the house? We have central air and use a Google Nest Thermostat. It's been working fine for years and all of a sudden it is not getting power to it and shows an error code of E298. I checked the fuse box and the breaker is good. I checked all the wiring behind the thermostat and all are still connected. Since it was working fine before I can assume the wires are in the proper place. It is connected to our WiFi just fine. We replaced the batteries in the thermostat. Is there anything else I should check? Called PSE&G and they can't come over until tomorrow. Thanks.

Nest.jpg
 
Any HVAC professionals in the house? We have central air and use a Google Nest Thermostat. It's been working fine for years and all of a sudden it is not getting power to it and shows an error code of E298. I checked the fuse box and the breaker is good. I checked all the wiring behind the thermostat and all are still connected. Since it was working fine before I can assume the wires are in the proper place. It is connected to our WiFi just fine. We replaced the batteries in the thermostat. Is there anything else I should check? Called PSE&G and they can't come over until tomorrow. Thanks.

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see if your condensate pump overflow is tripped - it disconnects the thermostat so it can't call for a/c

or if you have a tray underneath the air handler, see if there is water in it
 
see if your condensate pump overflow is tripped - it disconnects the thermostat so it can't call for a/c
That's interesting. We're having our driveway repaved today and the condensation outlet spills the water on to the driveway so they attached a hose to it to reroute the water. Could this be the cause? If so, do I just unplug the hose from the outlet? Is there a reset of some sort I need to do or it'll just start to work?
 
That's interesting. We're having our driveway repaved today and the condensation outlet spills the water on to the driveway so they attached a hose to it to reroute the water. Could this be the cause? If so, do I just unplug the hose from the outlet? Is there a reset of some sort I need to do or it'll just start to work?

if the condensate gets backed up into the pump, a little floater cuts the power to the thermostat - perhaps the pump wasn't strong enough for additional uphill.

you might have to push on the floater to get it going again - it cuts power to itself too, so it doesn't burn out.
 
if the condensate gets backed up into the pump, a little floater cuts the power to the thermostat
Spot on, that's exactly what happened. PSE&G guy came and it took him all of 5 minutes. There was too much water in the overflow and it tripped the floater switch. He blew out the regular pipe and sucked out the water in the overflow. Brilliant. Thanks.
 
Spot on, that's exactly what happened. PSE&G guy came and it took him all of 5 minutes. There was too much water in the overflow and it tripped the floater switch. He blew out the regular pipe and sucked out the water in the overflow. Brilliant. Thanks.
Similar issue a few years ago when my pump died. New pump solved the issue.
 
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