The '-AC' on the Chromotherm III display means the thermostat is not getting the 24V AC power it needs to function. It has nothing to do with Air Conditioning. (This, IMHO, is absoultely horrible product design. But that's what it is:-)). The Honeywell Chronotherm III allows you to program the temperature for specific days and specific times. If you have custom programmed your Honeywell to fit your schedule, but your schedule has changed, consider resetting the programmed options and adapting them to your new schedule.

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Chronotherm III Thermostat.

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It's the smart thermostat that: Keeps you . It typically takes four to eight days after installation for this thermostat to adjust to the.

Old Yeller was reincarnated as a thermostat. Even when injured (likely by a power surge), it soldiered on.

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Keypad failed so programming ability. I just bought a new Honeywell TC Chronotherm III programmable tstat to replace my old one (which is so old You will have to run a new set of wires to the stat from the furnace.

If you can't do it, then you need T Chronotherm® III Fuel Saver Thermostats TC models to select either independent or direct each wiring terminal, as the wire is removed, to avoid. control for a Mastertrol® Mark II or a Minizone control panel in a zoning .

Fig. 4- Typical wiring diagram for TC, TD zoned heating/cooling system.Your new Honeywell Chronotherm III Fuel Saver Thermostat is a precision instrument that’s quality-built to give you many years of satisfactory service.

Each day of the week can be programmed independently so that, regardless of your schedule, you’ll save fuel while automatically maintaining the standard of comfort you require. The Honeywell Chronotherm III allows you to program the temperature for specific days and specific times.

If you have custom programmed your Honeywell to fit your schedule, but your schedule has changed, consider resetting the programmed options and adapting them to your new schedule. I have the same issue of Honeywell Thermostat Chronotherm III TC.

It kept power off or said to replace batteries. We found out if we turned it off for a while, it .

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Honeywell CHRONOTHERM T8600D Product Data: Wiring Diagrams (fig. 15-20)

Honeywell Chronotherm Iii -ac

Oct 05, · Old Yeller was reincarnated as a thermostat. Even when injured (likely by a power surge), it soldiered on. Keypad failed so programming ability was lost. Oct 11, · I have a Honeywell Chronotherm III thermostat Model TC purchased in After returning home from a trip the face said to replace batteries. I replaced the batteries as instructed but once remounted the replace batteries comment was still on the face. I 5/5.HONEYWELL CHRONOTHERM III TM USER MANUAL Pdf Download.HONEYWELL CHRONOTHERM IV TC INSTALLATION INSTRUCTIONS MANUAL Pdf Download.