Thermostats tell your system how and when to change the temperature. They come in different makes and models, but the initial troubleshooting steps are the same for all thermostats. You need a soft brush, compressed air and a screwdriver.Know More
Make sure you have not tripped a switch or blown a fuse, and reset if needed. Confirm the power is on at the furnace. Call a certified technician if you are unsure what to do, or if things appear to be unsafe.
Replace the battery in your digital thermostat if there is no display. For an analog low-voltage model, make sure the unit is level and flush to the wall. If this doesn't fix the problem, gently pry off the cover, and clean the inside using a soft brush or compressed air. Visually inspect the components; replace loose wires and tighten terminal point connections. Never touch wires if you are unsure of voltage.
Turn the thermostat to the lowest setting; clean the bimetallic coil with compressed air or a soft brush, repeat for the highest setting. Return the thermostat to your desired temperature.
Thermostats control ambient temperature by sensing the temperature in a room and responding to that by activating heating or cooling equipment or remaining dormant. Most modern home thermostats rely on a bimetallic strip to determine the current temperature at or near the thermostat's housing.Full Answer >
The high temperature limit on a thermostat prevents the temperature in the area being monitored from exceeding its set point. For example, household dryers have a high temperature limit thermostat, sometimes called a safety thermostat, that shuts off the heat when the temperature reaches 240 degrees.Full Answer >
As of 2015, programmable thermostats for HVAC systems can be found at many retailers and home improvement stores, such as Amazon, Home Depot and Lowe’s. A programmable thermostat can help homeowners save energy by making more efficient use of their HVAC systems.Full Answer >
Generally speaking, thermostats work by using a mercury switch that is in contact with a thermometer wire to trigger a temperature-adjustment lever in response to the expansion or contraction of the wires as they are heated or cooled. The expansion and contraction of these wires triggers switch relays that control heating and cooling by triggering either a circulation fan and heater or air conditioner.Full Answer >