italie |
MAME owes italie many thank yous, hah
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Reged: 09/20/03
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Posts: 15246
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Loc: BoomTown
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Any HVAC guys in the house?
12/26/10 05:32 PM
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I have a Carrier Gas furnace, PAV58. Just put in the new thermostat, had to run a new common wire as the previous owners were not running one.
Seeing issues with the thermostat now where 24V is dropping out just before the heat cycle completes. It loses 24V for about 5 seconds, comes back right after. This is causing issues with temperature settings, as the thermostat doesn't have a battery backup.
I'm wondering if something energizing on the new thermostat (Fast TS21) that is causing the dropout, or it's the furnace and this behavior is what killed the last thermostat. I'm betting on the latter...
Any common issues on the control board to check?
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