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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8326
Experience:  Furnace, A/C and heat pump specialist.
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can I use the Nest Thermostat (1st Gen) with the Rheem RGJF

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can I use the Nest Thermostat (1st Gen) with the Rheem RGJF furnace and RARL AC?

Airheatman :

Hello. My name is XXXXX XXXXX I'll do my best to help. Troubleshooting often requires meters and test equipment. Let's get started and see what we can do.

Airheatman :

Absolutely. I will be glad to guide you with any details you migh have questions about.

If you had a jumper on old thermostat from R to RC or RH, That will not be necessary on the nest. One main thing you will need is a "Common" wire from C on the furnace control board to C on the NEST.
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Here is an excellent video and I will be here to assist with any questions.