Question about Heating & Cooling
Posted by Anonymous on
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Posted on Jan 02, 2017
With this thermostat, it may be flashing FAN because the HVAC (any heating or cooling unit) unit isn't working. In the winter, the pilot light for the heat may not be lit or the air intake/exhaust could be blocked. In the summer, the AC coils could be frozen or there may be another problem. Go to the HVAC unit and look for any lights at or near the control board. Check the outside unit for problems as well.
If there is no problem with the HVAC, try resetting the software in the thermostat. Use a bent paperclip to press the reset button above the Next button; the reset button is inside a small recessed spot. If the problem persists, try a different thermostat. If a different thermostat doesn't work, the HVAC system needs to be serviced.
I hope this helps. Please add a comment with the type of furnace you have (electric, gas, oil). That might help determine what issue you need to look for on the main unit.
Posted on Jul 03, 2015
It would point to that zone 1 valve is not working .
Posted on Nov 29, 2016
Testimonial: "Character limits kept me from making this clear. The one that works (#2) was installed in 2010; #1 in 2004. They have different #s. How do they differ?"
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