RobCrooke Posted May 16, 2009 Share Posted May 16, 2009 I have two ccz-t1 wireless thermostats connected to two independent heating and cooling untits. They were installed in the fall.The heat mode works fine.The AC mode does not work correctly.The AC unit (compressor) outside turns on and stays on, but the fan unit (in the heating unit) turns on for split second and then immediately off -- pauses for 2 seconds then the on/off split second again --Then paused for 2 seconds -- repeats over and over.I checked the wiring at both ends and it seems to be correct. Any ideas?Thx. Link to comment Share on other sites More sharing options...
ikey78 Posted May 18, 2009 Share Posted May 18, 2009 I have noticed the exact same thing with my thermostat.It is set to undershoot 1 degree but the fan often goes on and off for several seconds at a time.Any help would be appreciated. Link to comment Share on other sites More sharing options...
ikey78 Posted May 27, 2009 Share Posted May 27, 2009 Turns out to be a power stealing problem. When the air conditioner turns on there is not enough power to share or be stolen by the thermostat. The battery backup takes care of the problem, but when the battery wears out, the thermostat resets itself every time the air conditioner turns on.Temporary fix is to replace the battery. Permanent fix is to run a control wire to power the thermostat. Link to comment Share on other sites More sharing options...
C4Newbie Posted May 27, 2009 Share Posted May 27, 2009 I have two ccz-t1 wireless thermostats connected to two independent heating and cooling untits. They were installed in the fall.The heat mode works fine.The AC mode does not work correctly.The AC unit (compressor) outside turns on and stays on, but the fan unit (in the heating unit) turns on for split second and then immediately off -- pauses for 2 seconds then the on/off split second again --Then paused for 2 seconds -- repeats over and over.I checked the wiring at both ends and it seems to be correct. Any ideas?Thx.Is this still a problem or was it fixed and if so, what was done? Link to comment Share on other sites More sharing options...
RobCrooke Posted May 29, 2009 Author Share Posted May 29, 2009 I tried switching off power stealing tonight and it fixed the problem!Thx. Link to comment Share on other sites More sharing options...
henniae Posted May 29, 2009 Share Posted May 29, 2009 I tried switching off power stealing tonight and it fixed the problem!Thx.Did you verify that the common wire was connected from your HVAC system to the t-stat? If not your battery will drain quickly. Link to comment Share on other sites More sharing options...
RobCrooke Posted May 30, 2009 Author Share Posted May 30, 2009 It was not, but I did wire it up. Thx for asking though. Link to comment Share on other sites More sharing options...
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