Checking the Temperature: A Guide to Testing High Limit Thermostats
Testing a thermostat is an important part of maintaining a homes heating and cooling system. High limit thermostats are designed to detect when the temperature of a system has exceeded a certain limit and turn off the system to prevent any damage. Testing a high limit thermostat is a relatively simple process that requires basic tools and knowledge.
The first step in testing a high limit thermostat is to locate it. Most high limit thermostats are located on the side of the heating or cooling unit. It should be clearly marked, and it may have a reset button as well as other features.
The next step is to turn off the power to the unit. This can be done by flipping the circuit breaker switch or unplugging the unit. Once the power is off, the thermostat should be disconnected from the unit. This is done by removing the screws that hold the thermostat in place.
Once the thermostat is disconnected, the next step is to test the thermostat. This can be done using a multi-meter. The multi-meter should be set to the ohm setting, and the probes should be connected to the terminals on the thermostat. The reading should be between 0 and infinity. If the reading is anything other than this, the thermostat should be replaced.
The final step is to reconnect the thermostat and turn the power back on. Once the power is on, the thermostat should be tested again. This can be done by setting the temperature of the unit higher than the high limit setting. If the thermostat works correctly, the system should shut off when the temperature reaches the high limit setting.
Testing a high limit thermostat is a relatively simple process that can help to ensure the safety of a homes heating and cooling system. It should be done on a regular basis to ensure that the thermostat is working correctly and that the system is safe from overheating.
If the thermostat is not working correctly or if the readings are not within the expected range, the thermostat should be replaced. This is a relatively simple process that should not take more than a few minutes to complete. Once the new thermostat is installed, the system should be tested again to ensure that it is working correctly.