How to Replace a Thermostat
Why does my new thermostat not work? What to Check When Replacing a Thermostat.
Electrical Question: Why does my new thermostat not work?
- I am installing a thermostat. The original thermostat worked correctly and there was no issue. I removed the original thermostat yesterday and installed the new one, but it did not work.
- I put the old thermostat back on within 20 minutes but it did not work either. I reinstalled the new one today and called the manufacturer and I verified that it was wired correctly, but I found that the red wire was not sending power to anything.
- The red wire appears to be issue. It sent power yesterday, but as soon as I tool the old thermostat off nothing has worked since.
Thanks for the Help!
This electrical wiring question came from Dan, in Summerville, South Carolina.
Thanks for your electrical wiring question Dan.
Fix Wiring Problems when Replacing a Thermostat
Application: Thermostat for Controlling HVAC Heating Ventilation and Air Conditioning.
Skill Level: Beginner to Intermediate. This electrical wiring project is best performed by a Licensed Electrical Contractor.
Tools Required: Basic Electrical Hand Tools including a small screw driver and small wire strippers.
Estimated Time: Depends on personal level experience and ability to work with tools and the small thermostat wires.
Precaution: Identify the circuit for the furnace or heat pump, turn it OFF and Tag it with a Note before working with the thermostat wiring.
Troubleshooting and Testing: Most thermostats may be tested using a Volt/Ohm Meter. The thermostat battery should be tested and replaced as needed.
Notice: Make sure to get the exact replacement thermostat or or one that is a compatible replacement, such as a fully programmable thermostat.
What to Check if a New Thermostat is not Working Right
- A thermostat that is used for cooling or heating typically gets it’s power from the unit that it is controlling, therefore it is best to turn the heating or cooling unit OFF before replacing the thermostat.
- If the power remains ON while replacing the thermostat then there is a possibility of shorting the wiring which may damage the power supply and the thermostat.
- The voltage that is used for the thermostat will depend on the exact equipment and application.
- After replacing the thermostat the power source should be restored and turned back on so the thermostat may be set and tested.
More about Replacing and Wiring a Thermostat
- Furnace Thermostat Wiring and Settings
- I put in a new thermostat the old one was removed without labeling the wires
Troubleshooting Thermostat Wiring Connections
Repair Residential Electrical Wiring
Troubleshooting and Repairing Electrical Wiring
Electrical Troubleshooting Methods used to solve the majority of the home electrical problems and wiring failures encountered.
The following may also be helpful for you:
Learn more about Home Electrical Wiring
Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.
The Safest Way to Test Electrical Devices and Identify Electric Wires!The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester that I use to easily Detect Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.
The Quickest Way to Check for Faulty Electrical Wiring!The Plug-In Outlet Tester
This is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring.
It detects probable improper wiring conditions in standard 110-125 VAC outlets Provides 6 probable wiring conditions that are quick and easy to read for ultimate efficiency Lights indicate if wiring is correct and indicator light chart is included Tests standard 3-wire outlets UL Listed Light indicates if wiring is incorrect Very handy and easy to use.
Strip Off Wire Insulation without Nicking and Damaging the Electric Wire!The Wire Stripper and Wire Cutter
My absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires.
This handy tool has multiple uses:
The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation.
The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets..
The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use.
|More articles about Electrical Wiring and Home Electrical Wiring:|
|« Previous||Next »|
|Kitchen Range Circuit||Removing Light Fixtures When Painting a Room|