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scoop
09-17-2011, 06:56 PM
I have two separate zones in my home . The living space works fine.blower comes on for heat and a.c.
Bedroom is on a separate zone. separate compressor.
When a.c. is called for thermostat says a.c. is on but blower is not on. compressor is on outside.
When heat is called, thermostat says heat is on but no blower and compressor went on even though only heat was called for. It also has emergency heat which thermostat says is on even though heat pump did not come on.Was told it could be thermostat or reversing valve. Any thoughts?
jimj
09-17-2011, 07:09 PM
Has the thermostat been replaced recently?
scoop
09-17-2011, 07:11 PM
No. I was going to try that first.
jimj
09-17-2011, 07:14 PM
You may have shorted control voltage wiring, could have a thermostat issue.

A bad RV will not stop an indoor blower from running.
scoop
09-17-2011, 07:19 PM
Thanks for your help jimj. will try replacing thermostat first.
scoop
09-17-2011, 07:21 PM
Could a bad thermostat call for the compressor to come on even though heat was called for?
NCHeat
09-17-2011, 07:24 PM
Could a bad thermostat call for the compressor to come on even though heat was called for?

Do we have a heat pump or gas furnace? either way yes it could if we have shorted wires or stat
NRG$WIZ
09-20-2011, 03:53 PM
Heat pumps always have the compressor running.
Did you try checking all the functions at the unit it self /not using the
t-stat as a control?
Good Luck
gregp
09-20-2011, 04:29 PM
call a service tech to look at this for you. If you start replacing random parts, you'll end up spending more in the long run. :.02:
second opinion
09-20-2011, 04:31 PM
indoor blower motor?
HVACTechNC
09-20-2011, 04:43 PM
Heat pumps always have the compressor running.
Did you try checking all the functions at the unit it self /not using the
t-stat as a control?
Good Luck

Taking your advice could be deadly dangerous for someone not trained in servicing HVAC equipment. Please do not advise OP to bypass controls and manually engage equipment. We would all hate for someone to get hurt.

As for the issue, you said you have two zones. I am confused... Do you mean a zoned system or two seperate systems serving two seperate areas? If it is a single system zoned into two areas you may want to have the dampers and controls checked as they may not be opening as they should.

If it is two seperate systems and one of the two systems has no blower operation then it is time to call a pro and have them check low-voltage controls, fan relay, fan capacitor, and blower motor. In all likelyhood one of those will be the culprit.