I replaced my thermostat and now the furnace blower
won't turn on. It is giving an error of "reverse polarity, poor ground". (The thermostat is the same as what I replaced, so the wiring went in the same way.) What do I need to fix?
JA: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat?
Customer: I am not sure. Everything was working fine with the blower, the a/c, etc. before the replacement. I replaced the thermostat because the digital display and buttons were not working. After the replacement the furnace blower would not come back on and that error signal was flashing. The a/c outdoor unit is working.
JA: Do you plan on doing the work yourself?
Customer: If it is a simple fix, yes.
JA: Anything else we should know to help you best?
Customer: Not that I can think of.