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My Honeywell Chronotherm III thermostat is not working. I
My Honeywell Chronotherm III thermostat is not working. I have changed the batteries and checked all the settings, but the display shows the time, then -AC. Neither heat nor cooling will come on. Any … read more
Rick
Rick
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Honeywell thermostat says "-AC" Probably thermostat. If I'm
honeywell thermostat says "-AC" JA: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat? Customer: probably thermostat JA: Do you plan on doing the wor… read more
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Honeywell Chronotherm III unit shows 9642 and 189459D inside. We
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Have Honeywell Chromotherm III and the screen says replace
Have Honeywell Chromotherm III and the screen says replace battery. I have done that with three different sets of batteries to see if I have bad batteries. Same message on the screen. I replaced the w… read more
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My Honeywell Chromotherm III display shows -AC, and is unresponsive.
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Jerry
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I have a Chromotherm III programmable thermostat that does not seem to be working. I changed the Batteries hoping that was the problem. I run the manual option as there is someone here at all times. W… read more
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I came home to a thermostat needing new batteries. I changed
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Phil
Phil
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I have a Chromotherm III. I came home and the upstairs AC
I have a Chromotherm III. I came home and the upstairs AC was not working. Therm was barley readable and read "replace Batt". I replaced batt but still not turning AC on. Since we bought the house, th… read more
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Our heater keeps going off despite it not reaching the desired
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We have a programmable thermostat. Its set now on cool for
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i had the fan motor replaced in the outside compressor unit
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Re our Chronotherm III thermostat, the screen began flashing
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BillyHvac
BillyHvac
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I have a chromotherm III thermostat. This morning I had no
I have a chromotherm III thermostat. This morning I had no display. Since I had to leave for work, I went online to trouble shoot. When I got home, I had a display but the time was wrong and I felt it… read more
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I have honeywell chronotherm III T8602C1095 9306. It has three
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AC does not come on after changing the battery. It reads "Hold- AC"
Our thermostat;s battery went dead. After we replaced the batteries, the Ac will not come on. It reads "HOLD -AC". Is there a way to reset the thermostat?… read more
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Meet the Experts:

Phil

Phil

Mechanical Engineer

7,791 satisfied customers

Retired HVAC/ Electrical & Boiler contractor. Industrial

Rick Mather

Rick Mather

HVAC Technician

3,133 satisfied customers

35 years experience, HVAC

Matthew

Matthew

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Brian HVAC Guy

Brian HVAC Guy

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Kenton Guidry

Kenton Guidry

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Rick Ridley

Rick Ridley

UK Heating Engineer

871 satisfied customers

Retired But have had 30 years on the tools, Ex CORGI

Tom

Tom

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16+yrs HVAC/R service. Residential Commerical Industrial

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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