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Posted by Noon-Air on February 4, 2008, 10:59 am
>I have a Honeywell Chronotherm 3 thermostat (T8602) that is giving me
> trouble. I use to override the WAKE, SLEEP, etc. settings and use the
> thermostat manually by pressing the up or down arrows to get to the
> temp I wanted and then press the hold button. Worked great. Can't do
> that anymore. When I set it to the temp I want, the furnace will come
> on for a few minutes and then stop. Then the thermostat makes a
> clicking noise for about 30 seconds. The batteries are fresh. The
> thermostat is about 20 years old. Any help would be appreciated.
> Thanks.
Sounds like time to get a new stat. I would also guess that the system is 20
years old also... maybe replace them as a set??
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