How to Replace an Old Thermostat by Yourself?

What is a thermostat?

The thermostat detects the real-time temperature and sends that information to your HVAC systems. With the help of a thermostat, air conditioners, furnace, heat pump, and other climate-controlling equipment, control the temperature of your room/ building. The thermostat parts and accessories are used in both residential and commercial HVAC equipment. 

Modern and trending thermostat:

• Programmable Thermostat
• Smart Thermostat
• Non-Programmable Thermostat
• Wi-Fi Thermostat

What are the common signs of failed thermostats?

• Air conditioner not turning ON: When the thermostat sends the signals, the air conditioner starts the work and maintains the temperature of your room. If your thermostat fails, then the air conditioner or other HVAC equipment does not start the work.
• Air conditioner not turning OFF: The thermostat controls the fan setting in the air conditioner cooling process. Failed thermostat sometimes prevents the fan unit from turning off.  
• Less cool/ extra cool air: Failed thermostat can not communicate with the blower motor. The blower motor runs too cold or less cold without thermostat temperature setting inputs. To fix this issue, reset the thermostat. Many times, the resetting process resolves the thermostat problem.
• AC suddenly stops working: A broken thermostat stops the air conditioner work. Or extra ductwork, damaged blower motor, and others are also reasons for suddenly stopped air conditioner.
• Short cycling: When dirt or dust accumulates inside the thermostat, then the thermostat creates issues like it runs continuously or short cycling.

Why is my thermostat malfunctioning?

Electricity supply issue: Try changing the batteries while checking the electrical panel for blown fuses or tripped breakers. Remove the lid and make sure your breaker is off and the thermostat is not in use.

Soiled thermostat parts: Using bottled air or a soft artist brush, remove any built-up muck that might be impairing the system's functionality. 

Unsecured wire or screw connections: Check your system for any loose terminal screws or wire connections. Please confirm, then correct them.

Variable temperature: To correct it, raise a carpenter's level immediately above the instrument and adjust it as necessary to level it once more.

If the above method fails, it might be necessary to replace your outdated thermostat parts with a new replacement that is suitable for your system.

How to install a thermostat at home?

Before going to install a new thermostat, follow the below steps:

• See the existing thermostat specifications and your air conditioner specifications.
• Use a programmable thermostat to decrease electricity consumption. 
• Ask HVAC technicians whether your new thermostat is compatible with your air conditioner or not
• The installation processes of programmable thermostats and non-programmable thermostats are slightly different.
• Turn off the power supply to the air conditioning system.
• Wear safety hand gloves. 
• Collect all necessary tools.

Steps to install a new programmable thermostat at home:

• Find the circuit breaker box. Circuit breaker located in basement, closets, or crawl spaces.
• Reset the circuit breaker to turn off the air conditioner.
• Remove the faceplate of the thermostat.
• Uncover the old thermostat. Use the correct tool to unscrew it.
• Remove the old thermostat from the wall.
• Label the wire connections or take pictures of the wire connections for future reference.
• Carefully disconnect the wires.
• Unpack the new thermostat.
• Install new thermostat.
• Reconnect all connections according to the last wire setup.
• If your thermostat battery needs to be replaced, replace it with a new one.
• Reattach the thermostat faceplate.
• Wait for 30 to 60 seconds before turning on the circuit breaker. 
• Turn on the air conditioner in the circuit breaker. 
• Observe if your thermostat and air conditioner are working properly
• If the problem persists, then call an HVAC professional.

Frequently Asked Questions

Can I replace a thermostat myself?

The thermostat is easy to install. But smart and programmable thermostats need an HVAC professional to install the thermostat. 

Best online platform to buy Thermostat equipment parts?

Buy the best thermostat equipment parts from the PartsHnC platform, which is suitable for your air conditioner and your requirement. PartsHnC is a top trusted HVAC parts and accessories eCommerce platform. 

What is the importance of a thermostat?

The thermostat is an essential part of every HVAC equipment because it helps HVAC to control the temperature. So, the quality and current installation of the thermostat is necessary for your air conditioning system.

How much do a thermostat and installation cost?

The cost of the thermostat lies between $15 to $250. Installation cost varies depending on factors like location and type of thermostat and is approximately $40 to $250 without including a thermostat cost.

Refer to the following links to buy the best quality thermostat parts:

Product Name: Thermostatic Expansion Valve For Danfoss Part 
Part Number: 068Z3411
Manufacturer Name: Danfoss Parts

Product Name: Discharge Thermostat For Lennox Part
Part Number: 78M23
Manufacturer Name: Lennox Parts And Supplies

Product Name: R22 3Ton Thermostatic Exp Valve For Trane Part 
Part Number: VAL8610
Manufacturer Name: Trane

Product Name: Thermostat For Lochinvar & A. O. Smith Part
Part Number: 100109920
Manufacturer Name: Lochinvar & A. O. Smith

Product Name: Defrost Thermostat For Amana-Goodman Part
Part Number: 0130M00197
Manufacturer Name: Amana Goodman

Product Name: Thermostat Shank For Rheem-Ruud Part
Part Number: SWT3025
Manufacturer Name: Rheem-Ruud

Read the above common problems of a bad thermostat and replace failed thermostat equipment parts. PartsHnC provides a 30-day of return policy, the lowest prices compared to competitors, same-day shipping, and 24/7 customer service. For any purchase or website-related questions, reach us at [email protected], or call (866) 963-0907.