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Honeywell chronotherm t8082

Clock not working

Posted by Anonymous on

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 252 Answers

SOURCE: Thermostat not functioning correctly

-AC means there is no power coming from the furnace. not a tstat problem

Posted on Oct 04, 2009

  • 308 Answers

SOURCE: my honeywell chronotherm III says -AC any ideas

The problem is your 24v power source. I am unsure as to why you put "other than power source or batteries". If you did indeed check that your thermostat is receiving 24v, then I would say that you have a bad thermostat. Hope this helps

Posted on Jan 23, 2010

  • 1 Answer

SOURCE: I have a very old manual Chronotherm thermostat.

how do i remove an old honeywell climate master

Posted on Jan 26, 2010

  • 415 Answers

SOURCE: honeywell chronotherm iv fan keeps running even

Assuming you have the fan switch of your thermostat in AUTO, it sounds like a stuck Fan Relay. If the fan relay is stuck, your fan will continue to run as long as there is line voltage being fed to your unit. This relay could be an independent component or it could be an integral part of your control board. Have an experienced, qualified service technician check it out.

Posted on Mar 19, 2010

  • 1 Answer

SOURCE: I HAVE A "honeywell chronotherm

Open the front panel, opens from the top, hinge at the bottom. You will see 2 Philips screws at the bottom at the "hinge" part. Unscrew them. Pull the thermostat from the wall by pulling off the top part. You need 3 AA batteries. You have 20-30 sec to change the battery without re-setting the program, so be prepared and have batteries handy. Make sure your + and - are in correct order- have a flashlight handy to see well. If you done it in time- you all set, if you are a bit late prepare to re-program according to your liking. You can re-program it while it is away from the wall, sitting in your chair! Instructions are on the inside panel, which you open All the best!

Posted on Dec 09, 2010

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1 Answer

Replacing chronotherm with new rth7600


R= power in G= fan Y= cooling W=heat O= heatpump reversing valve C= common used for clock on chronotherm Usually its pretty streight forward wire for wire. Unless you have a heatpump. The thermostat has to be heatpump compatable. And I ll usually use the 8000 for this. The w and y jumper may not be necesary on the new thermostat as the new one should do it internally once programed as a heatpump thremostat. At least thats how the 5000 and 8000 sreies work. So imagine the 7000 would be the same. You may also have to program the reversing valve operation not all manufactuers do it the same . Some valves have to be powered for heat while others have to be powered for cooling. Good luck

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To turn the fan off, press the "fan key" until it says "auto". This will turn the fan off. When the programs scheduled, changes, the fan will go on again. You have to repeat the fan to "auto" each time the schedule changes.

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Honeywell Chronotherm iv fan keeps running even when heat and cool turned off. How do I turn it off?


Assuming you have the fan switch of your thermostat in AUTO, it sounds like a stuck Fan Relay. If the fan relay is stuck, your fan will continue to run as long as there is line voltage being fed to your unit. This relay could be an independent component or it could be an integral part of your control board. Have an experienced, qualified service technician check it out.

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I have a very old manual Chronotherm thermostat.


No. The clock is just the set back timer. Pull the battery and use the stat manually.

Jan 26, 2010 | Honeywell Electronic Programmable...

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My honeywell chronotherm III says -AC any ideas


The problem is your 24v power source. I am unsure as to why you put "other than power source or batteries". If you did indeed check that your thermostat is receiving 24v, then I would say that you have a bad thermostat. Hope this helps

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Unfortunately, no. These clocks fail frequently.

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Check to see if you have wires going to a C/C1 terminal. The older chronotherms used a transformer to supply 24 volts to power the clock. If in fact you do have these terminals, then I would suggest checking the output voltage on the transformer, (secondary (24v)side) to ensure it isn't close to dead. Hope this helps

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The two wires from the transformer are to run the clock in the old thermostat. If you connect the two other wires to any heating thermostat, it will work. Don't forget to disconnect the transformer wires. Hope this helps

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I have a Honeywell Chronotherm IV Plus a/c unit and I can't get my air condt. to turn on. The room temp. says it's 17 degrees in the house so it won't turn on. I need to know how to reset the room tempt....


Not only are the Chronotherm IV's less than user friendly, they have a terrible failure rate. It sounds like one of the typical failures of the chronotherm IV. I suggest starting with a new thermostat.

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There are no batteries on an 8600-8601-8602 series

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