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wdrzal · 01-31-11, 06:00 PM

HI cholcombe

The short cycling is usually caused by the heat anticiapitor inside the thermostat. It adds a small bit of heat to keep the thermostat from overshooting ,but it cools quickly ~< 1 to 2 minutes,causing a call for heat(short cycling). They are adjustable, a millamp setting ~.1 to 1.5 milliamps is usually found. A reading is taken of the thermostat circuit and that is used as a baseline/first setting. They also usually have the words longer/shorter marked , moving it one or two marks at a time should stop the short cycling.(toward longer) Old thermostats also can do this do to a accumulation of dust on the bulb or because the bimetal strip has gone through so many on off cycles it becomes "sprung".

Also I'm assuming this is a mercury bulb thermometer,it also has to be level if you had it off the wall for remodeling.

It's possible it's a aquastat by my money would be on the T-stat.

Digital based thermostats use algorithms to anticapate heat , and the better models can actually "Learn" not to short cycle or over shoot.

01-31-11, 06:00 PM	#10
wdrzal Lurking Renovator Join Date: Jan 2011 Location: Pa. Posts: 12 Thanks: 0 Thanked 2 Times in 1 Post	HI cholcombe The short cycling is usually caused by the heat anticiapitor inside the thermostat. It adds a small bit of heat to keep the thermostat from overshooting ,but it cools quickly ~< 1 to 2 minutes,causing a call for heat(short cycling). They are adjustable, a millamp setting ~.1 to 1.5 milliamps is usually found. A reading is taken of the thermostat circuit and that is used as a baseline/first setting. They also usually have the words longer/shorter marked , moving it one or two marks at a time should stop the short cycling.(toward longer) Old thermostats also can do this do to a accumulation of dust on the bulb or because the bimetal strip has gone through so many on off cycles it becomes "sprung". Also I'm assuming this is a mercury bulb thermometer,it also has to be level if you had it off the wall for remodeling. It's possible it's a aquastat by my money would be on the T-stat. Digital based thermostats use algorithms to anticapate heat , and the better models can actually "Learn" not to short cycle or over shoot. Last edited by wdrzal; 01-31-11 at 06:16 PM..