Keeping Your HVAC System In Great Condition

Signs That You Need To Replace Your Faulty Furnace Thermostat

6 October 2022

Herbert Franklin

Furnaces are essential in the household as they keep you comfortable during winter. These heating appliances consist of mechanical and electrical components to deliver optimum temperatures. The furnace thermostat is the main control point determining when and how much heat a furnace generates. However, your thermostat may malfunction and hinder your heater's performance. Thus, it is wise that you contact a furnace contractor to inspect and fix your system. Below are four indicators that you need to replace your thermostat:

Short-Cycling 

When the thermostat's wiring is loose, it can cause your furnace to turn on and off irregularly at rapid intervals. This is because the thermostat sends inaccurate instructions to the system, causing it to stop and start up before attaining the set temperature. As a result, the additional strain on its components causes the furnace to overheat, triggering the limit switch. Therefore, you should engage a heating repair specialist to inspect and replace your thermostat. Moreover, they will ensure the thermostat runs on proper voltage for seamless operation.

Incorrect Thermostat Readings

A thermostat displays the room temperature and allows you to adjust it to a specific set point. Nonetheless, dust accumulation on the thermostat's sensor may lead to inaccurate temperature detection. If this persists after cleaning the component, your thermostat could be defective. This may cause it to adjust the temperatures erroneously, resulting in a too-hot indoor space. Accordingly, hiring a furnace professional to inspect your system is imperative. They test its functionality, and if they determine that it's irreparable, they replace it.

Blank Display

Digital displays on modern thermostats continually display the room temperature and time even when the system is not running. As such, when your thermostat display goes blank, it could be malfunctioning. This is likely due to a power surge in your furnace circuitry, causing the breaker to trip. Consequently, the system shuts down and cuts power to the thermostat, which is why there's nothing on the display. On the other hand, the issue could be due to the thermostat's wiring not being secure and therefore disengaging. Regardless of the cause, you need to contact a heating repair technician to diagnose and fix your thermostat.

Difficulty Saving Settings

Modern furnaces have smart thermostats that incorporate programmable features to suit your needs. These thermostats respond promptly to changes when you adjust temperature settings. However, a faulty thermostat will fail to engage the furnace instantly after you make these changes. Besides slow response time, a defective thermostat may even forget your temperature settings. So, it is advisable to hire a furnace expert to check out your thermostat and resolve the problem so that you can program it conveniently.

A functional thermostat operates efficiently, enabling the furnace to deliver optimum temperatures. To facilitate this, schedule regular tune-ups with a heating repair technician to inspect your unit and perform the required maintenance for peak functionality.

Speak to an HVAC system repair service provider to learn more. 

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