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nest Thermstat install error code 298

egallacher
Community Member

My old thermostat uses 3 wires red, green, white  I have a spare black wire.

4 REPLIES 4

Patrick_Caezza
Gold Product Expert
Gold Product Expert

The E298 error means there is no power to the Nest thermostat.

What type of heating system do you have? 

With only 3 wires the Google Nest normally requires that a C wire be installed by using a spare wire between the thermostat and heat source or you can use the Nest Power Connector.

Some heat-only systems are only looking for a switch closure to turn it on. If that is the case, you will need an external 24VAC transformer and a small relay.

MelbaDT
Community Specialist
Community Specialist

Hey folks, 

 

Thanks for your answer and for the helpful link, Patrick_Caezza. 

 

egallacher, I'm chiming in to ensure that everything is covered here. Have you check on the link provided above? How's your thermostat now?

 

Best, 

Melba

MelbaDT
Community Specialist
Community Specialist

Hey egallacher, 

 

I'm checking back in ― how's your thermostat now? Still need help with it?

 

Best, 

Melba

MelbaDT
Community Specialist
Community Specialist

Hi, 

 

I haven't heard from you in a while so I'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community.

 

Best, 

Melba