Thursday, July 17, 2014

Troubleshooting a Broken Thermostat

The thermostat serves as the control center for an HVAC system. When it goes bad, the entire unit follows suit. When the entire HVAC system doesn’t seem to budge, a damaged thermostat is one of the most likely causes. Here are a few troubleshooting tips.

The thermostat must be installed in the proper location. Owners need to ensure that the thermostat is installed in the correct place; for instance, a thermostat installed on a wall with high heat gain or heat loss will never work properly as it will mainly react to the temperature of the wall and not to the air indoors. Also, a thermostat exposed to direct sunlight is going to experience problems.

Is there a big hole behind the thermostat that feeds either cool or warm air drafts to the device? Virtually every thermostat is designed with a hole that lets wires in. If the wiring hole happens to be situated at the back of the component, the hole must be stuffed with insulation and covered with tape to prevent drafts from affecting the thermostat’s functions.

Checking the heat anticipator is also vital. A main part of most mechanical, non-digital thermostats, the heat anticipator needs to be set according to the amp draw on the heating control circuit. It offers a small amount of energy savings, and it also prevents thermostat overshooting as it shuts off the main burners and allows the fan to continue running and dissipating heat.


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