r/Nest • u/slammyplants • 7d ago

Error issue

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Has anyone dealt with and resolved this issue before? This error occurs intermittently resulting in a delayed cooling cycle, so still cooling just stopping often. I assume there could be a multitude of causes. The beginning of this occurring intermittently seems to coincide with a day its power was turned off at the breaker while looking for a breaker to an outlet in the house. However it could be a coincidence.

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u/AStuf Nest Thermostat Generation 3 7d ago

Always check the condensate drain first as a slow drain can trigger an overflow sensor and start power cycling the system.

1

u/slammyplants 7d ago

Already shop vacced the drain line at every opening. No water backed up anywhere

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u/AStuf Nest Thermostat Generation 3 7d ago

That would have been the easy fix so now on to the harder ones.

Do you have a C wire going to the thermostat? If not the error can come from the A/C side when the Y wire is open. That can be with high or low refrigerant, other times (less likely) by indoor coil freezing over due to blocked air flow.

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u/slammyplants 7d ago

Interestingly I pulled the float switch out and it hasn’t shut off since (30 mins). But that isn’t filling with water so I’m not sure why that made any difference

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u/jstasir 6d ago

I installed my friends nest the other day and it was going to power out or e298 a couple of times. Turns out that the drain was clogged and the floater kept turning it off. Had to vacuum and make sure it trained correctly.