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Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater - Page 4 Questions & Answers
Mine is a Honeywell st9400c also (same as
By the way the battery is a common CR2032 battery and can be swapped out in 2 minutes. Turn off the unit at the mains, 2 screws at the bottom, push in the plastic connectors and the battery can be slid out
6/29/2014 4:16:13 PM •
Honeywell...
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Answered
on Jun 29, 2014
Why does an ac unit recover?
Check the stat for continuity using a VOM. Check connections? Reset and Reprogram system. Lastly call Honeywell.
6/28/2014 4:33:25 PM •
Honeywell...
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Answered
on Jun 28, 2014
Why does the air conditioner comes on when turned its turned off at the thermostat?
Sounds like the internal thermostat is stuck causing the unit to think that it is not cold.
If you would like to tackle it yourself it is usually a part of the Expansion valve, witch will require opening the system. I suggest a service professional as Freon is hazardous, and being wrong is expensive.
It could just be that the rheostat on he control knob is going bad BUT that wouldn't cause Ice to form on the Unit.
5/15/2014 2:38:50 AM •
Honeywell...
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Answered
on May 15, 2014
Rth9580wf1005 changing setting on own
There may be a sudden weather change or heat change that may set it of. Also it might help to double check your settings just in case one of the buttons or dials have been knocked.
3/1/2014 7:50:03 PM •
Honeywell...
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Answered
on Mar 01, 2014
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