How Do You Test A Bimetal Thermostat?
A bimetal thermostat is an electrical component used in furnaces and other devices that are turned on and off based on the ambient temperature. There are several variations of the bimetal thermostat, including the coiled thermostat that is common in some dial household thermostat controls. There are others that are simple strips with one type of metal on top and another type on the bottom. These different metals expand at different rates when the temperature rises. For a coiled bimetal thermostat, the metal on the inner side of the coil expands more, causing the coil to partially unwind and the temperature needle to move to the right. For a strip bimetal thermostat, the metal on the bottom expands more, caused the strip to bend upward, breaking an electrical contact, which would turn off the furnace in a household application. Locate the bimetal thermostat. For a furnace, it is usually found where the temperature control in the house is located. If you are checking the bimetal thermost
