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2 Seperate Thermostats - Same Issue

Jase1
Community Member

I had a Nest Learning work for about 18 mos.

3 weeks ago aux heat stopped working - however it worked in Test via the stat.

Dual Fuel System, Electric Heat Pump(w/Rev. valve), Gas Furnace - the signals to run are routed through the HP control board.

After ~6 hours with google, they sent a new stat - exact same issue.

Furnace tech did a factory reset, on the new t-stat, things started working.

Last night the same thing happened, no aux heat(we are below lockout temp for HP), and now no fan either.

Individually the components work in test mode.

I am struggling to determine if this is a Nest issue or a local control issue.

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