When the thermostat doesn't reach the set temperature, what should I do?

When the thermostat doesn't reach the set temperature, what should I do?

In case the temperature in your house or office is not what you selected as the desired temperature from your thermostat, your thermostat/ HVAC system may be malfunctioning. Your thermostat might occasionally have technical issues, just like any other gadget. It won't accurately measure the temperatures or provide the readings if the program it uses has also crashed.

Recalibrate the Thermostat

Your thermostat's calibration needs to be checked at least once a year to avoid an increase in energy expenditures. You need to buy a thermometer designed for air conditioning and use it in close proximity to the thermostat to compare the variations in the two readings after 15 minutes. After that, calibrate the thermostat using the thermometer readings and its user instructions.

Change Thermostat Location

Your thermostat should be located where it is able to accurately sense indoor temperature. Extra warmth such as that of direct sunlight, fireplaces and kitchens may mislead the temperature sensor. If this is the case, relocate with the help of a Certified HVAC expert.

Investigate Loose Thermostat Wiring

Wiring may be an issue if a recently installed thermostat has been problematic. Watch out for loose wires jingling around the back of the thermostat as well as lint and corrosion build-up which may block the flow of current.

For more information on thermostat wiring, check out the article here

Check for Thermostat's Power

Power to the thermostat may go OFF preventing the thermostat from achieving set temperatures. This may be seen when the screen is blank/ dark and when the condenser and furnace are not running. Verify that the system is receiving power. You may need to flip the circuit breaker switch to OFF and then back to ON position to confirm that your system is receiving power. If this does not resolve the issue, please contact a Certified HVAC expert for further diagnosis.

Check for Clogged Air Filters, Vent and Ducts Blockage

Locate your furnace and inspect the condition of your air filter. A clogged air filter will have issues maintaining set temperatures and this may need to be replaced. Servicing the vents and ductwork will improve air circulation and enable the system to achieve thermostat settings.

Clean Dirty Thermostat

Just like any other home equipment, thermostats are not immune to dirt. Dust and dirt build-up in the internal components can generate excess heat resulting in inaccurate readings. Wipe away any dirt residue using a soft cloth/brush.

Replace the Old Thermostat

A thermostat has a 10-year lifespan on average. The furnace, air conditioner or heat pump may receive incorrect data from an obsolete thermostat which is unable to accurately read the temperature of your home. If your existing thermostat struggles to maintain set temperatures, it’s time to start considering getting yourself a replacement.

Here are the available Wired and Wireless (Wi-Fi) thermostat options.

Ensure your Thermostat is Level

Your thermostat may be mounted in a perfect spot but not well aligned. For some thermostat models (most mechanical), temperature adjustments are based on bimetal springs' horizontal mercury switch. When it is not properly leveled on the wall, the achieved temperature may be inaccurate.

Use a small level to balance the thermostat after removing the faceplate. Better still, you can as well replace the thermostat with advanced models available here.

Reboot Frozen Thermostat

Your thermostat's touchscreen may freeze and fail to show data updates if there is a problem with static electricity around it. It can be challenging to tell your electronic thermostat isn't setting the proper temperature in this scenario. The recommended solution is to turn off the device and wait for 5-15 seconds before turning it back on.

Contact our HVAC Controls Engineering team for assistance with custom HVAC control solutions or learn more here.

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