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Thermostats act as the central hub of your HVAC system, relaying crucial information and adjustments to the heating and cooling system. From there, the thermostat continues to monitor the environment and makes further adjustments as needed. 

So what happens if your thermostat stops working? The experts at Chapman Heating, Air Conditioning & Plumbing are here to help you understand why this occurrence may have happened, how to fix the problem, and how to avoid it in the future.

Common Thermostat Issues that Affect Your HVAC System

Several thermostat issues can affect your HVAC system and, ultimately, the comfort of your home. Let’s take a deeper look at the common reasons that could lead to your thermostat not working properly.

Thermostat Not Getting Power

If your thermostat screen is completely dark and won’t respond to inputs, it’s likely not receiving any power. No reception of power could be the result of: 

• Dead batteries 
• A tripped circuit breaker
• A tripped safety switch

Start by replacing the thermostat’s batteries. If this doesn’t do the trick, locate the circuit breaker. If the switch has been tripped, flip it back to “on,” and hopefully, that will resolve the issue.

If these steps don’t bode well, inspect the heating and cooling systems to find out if a safety switch has been tripped—flip the switch if that’s the case.

Thermostat Not Reaching Set Temperature

Have you noticed your thermostat isn’t reaching a set temperature? This could be due to a couple of reasons, such as: 

• Dirty temperature sensors
• Damaged sensors
• The thermostat was installed in the wrong spot

Over time, dust, dirt, and other debris can populate the thermostat and cause the sensors to become dirty. Remove the thermostat cover and use a soft-bristled brush to clean the interior parts. If the sensors are damaged, you’ll need help from a professional to fix the issue.

Another possibility is that the thermostat was installed in a poor location. Thermostats exposed to direct sunlight, drafts from a nearby window, or heat from an air vent can lead to this complication.

If this is indeed the cause behind the thermostat not working, the unit will have to be relocated with help from a professional.

Thermostat Won’t Let You Change the Temperature

A thermostat that refuses to let you change the temperature has either been locked, lacks power, or is the victim of bad or loose wiring. If the child lock setting is active, it’ll need to be disabled before it allows you to change the temperature.

A thermostat not getting power could also be the root of this problem. As mentioned earlier, try replacing the batteries, checking the circuit breaker, and inspecting the heating and cooling systems for a tripped safety switch. Thermostats are often left unresponsive when wiring is loose or bad. Remove the cover of the unit and visually inspect the inside for detached, loose, or damaged wiring.

If you spot the following, turn to an expert for assistance.

HVAC System is Running Continuously

While it may not be noticeable right away, have you come to the realization that your HVAC system is continuously running? When it pertains to the thermostat, the “auto” fan feature may be on, or the unit is malfunctioning. If the fan is set to “auto,” change it to “on” so it only operates when the heating and cooling system is operating. 

Didn’t work? Contact an expert to determine if there’s an internal problem with the thermostat causing this issue.

Thermostat Not Turning On

A thermostat not turning on is most commonly related to incorrect settings, an overheated HVAC system, or the unit being broken. First, make sure the thermostat setting is where you want it to be. If you’re looking for heating, make sure it’s set to “heat,” and if you want air conditioning, make sure it’s set to “cool.”

In the event your HVAC system turns on for only a brief period and won’t turn on again, overheating should be considered a possibility. Replace the system’s filter and make sure all vents are open to circulate sufficient airflow. To avoid damage to the compressor component, the air conditioner is going to take at least three minutes to kick back on.

If these steps haven’t solved the problem, the thermostat could be broken and in need of repair or replacement.
Schedule Thermostat Repair or Replacement

How to Know When Your Thermostat Needs a Replacement

While sometimes a simple solution can restore the functionality of your thermostat, replacement is ultimately necessary at some point. Understanding when replacement is needed is essential for satisfactory comfort and energy efficiency. 

Here are the signs to look out for: 

• The thermostat has reached over 10 years of operation
• The thermostat is incompatible with your current HVAC system
• Your unit has undergone too many repairs 
• Recent upgrades to the HVAC system or renovations to the home 
• The thermostat is struggling to maintain temperatures or make adjustments

Avoid Costly Repairs or Replacements with Routine Maintenance

One of the most effective measures you can take to keep repairs to your thermostat at a minimum and avoid premature replacement is routine maintenance. Making routine care and enlisting other helpful measures for your thermostat provides appropriate temperature control and benefits the condition of the entire HVAC system, prolonging its lifespan.

Here’s how: 

• Regular cleaning of the thermostat’s exterior and interior 
• Replacing the HVAC filters when it’s needed (Every 1 to 3 months)
• Make sure the thermostat is free of direct sunlight, heat sources, drafts, and obstructions
• Routine test of the thermostat to observe its performance 
• Follow necessary software updates (Smart thermostats)
• Use a thermostat cover if the unit is susceptible to accidental adjustments or unnecessary damage
• Schedule professional maintenance to catch issues early and keep performance efficient

Get Expert Help for Your Thermostat Troubleshooting Needs

In need of professional assistance with your thermostat in Indianapolis and its surrounding areas? Turn to Chapman Heating, Air Conditioning & Plumbing. Our professional technicians will accurately diagnose the issue with your thermostat and provide the necessary solution to restore its functionality and reestablish proper home comfort.
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