Common Causes for Inaccurate Thermostat Readings

August 5, 2025

When your thermostat produces inaccurate readings, your HVAC system works harder than it should. At in San Antonio, TX, we’ve seen how installing a thermostat in the wrong location or a wiring issue can cause inaccurate readings, affecting your comfort. If your heating or cooling never feels quite right, your thermostat might be the culprit. Let’s look at what’s going on behind the display. Thermostat Placement: The Impact on Comfort Where you place your thermostat can significantly affect how well your HVAC system functions. If it’s in a spot that gets too much sunlight, is near drafts, or is located too close to a vent, your thermostat may give inaccurate readings. For example, placing it on an exterior wall or near a window can cause it to sense colder temperatures than the rest of the room. This can cause your system to overcompensate by running the heater or air conditioner longer than necessary to reach a desired temperature. The best place for your thermostat is in a central area of your home, away from direct sunlight, vents, windows, or doors. Keeping it on an interior wall, ideally in a room where you spend most of your time, will give you...

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