Honeywell T87F 2873 Thermostat Vintage MCM Heat Anticipator Indicator

Understanding the Thermostat Anticipator: A Crucial Component. The thermostat anticipator, often referred to as a "heat anticipator" or "cool anticipator," is a small, often overlooked component within your thermostat. It plays a crucial role in regulating the heating and cooling cycles of your HVAC system, ensuring smooth operation and preventing excessive cycling.. How to calibrate thermostat. Next, adjust the heat anticipator, which fine-tunes the point at which the thermostat turns off the furnace burners. Locate the heat anticipator adjustment lever arm (Photo 2). If the furnace is cycling on and off too often, move the lever away from the "longer" setting by one calibration mark.

The purpose of a thermostat heat anticipator is to "de-sensitize" the thermostat so that when actual room temperature is hovering close to the set temperature on the thermostat, the thermostat switch won't keep switching the air conditioner or heating system on and off too often - which can damage the equipment.. The correct way to set the heat anticipator setting on your Thermostat is to measure the current draw of the gas valve or oil burner plus the heat assist device if it has one. If you have a clamp on the ammeter, wrap 10 (ten) turns of wire around the pick-up and read the current and divide by 10.