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Electrical Wire and Cable


How to Replace a Thermostat

Why does my new thermostat not work? What to Check When Replacing a Thermostat.

Do You Need Electrical Help? help with residential electrical wiring

Guide to Residential Electrical Wiring guide to electrical wiring

Thermostat Problem
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.

Dave’s Reply:
Thanks for your electrical wiring question Dan.

Problems when Replacing a Thermostat

Application: Thermostat for Controlling HVAC Heating Ventilation and Air Conditioning.
Skill Level: Beginner to Intermediate – Best if wired 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

More about Replacing and Wiring a Thermostat

Troubleshooting  Thermostat Wiring Connections

Repair Electrical Wiring
Troubleshooting

Troubleshooting and Repairing Electrical Wiring

Electrical Troubleshooting Methods used to solve the majority of the home electrical problems and wiring failures encountered.


» You Can Avoid Costly Mistakes! «

Here's How to Do It:
Wire It Right with the help of my Illustrated Wiring Book

Great for any Home Wiring Project.


  electrical wiring  

Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Includes:
Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
NEC Codes for Home Electrical Wiring
....and much more.





Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

Electrical Tips to Help You Wire it Right

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.

« Understanding Automatic Gate Opening Systems How to Wire a 3 Phase Air Compressor »

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