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Electrical Wire and Cable


How to Change a Thermostat

Thermostat Problems and How to Fix Them: Wiring a Heating and Air Conditioning Thermostat.


Replacing a Thermostat
Electrical Question: I have two thermostats, one downstairs in the hallway and the other one is upstairs in my bedroom. I wanted to replace them with a digital thermostat. I was able to change the downstairs thermostat, but when I tried to do the upstairs I had no success.

What do you think I did wrong?

Jason

This electrical question came from: Jason, from Atlanta, Georgia.

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

Wiring a Heating and Air Conditioning Thermostat

Application: Replacing and Installing a Thermostat.
Skill Level: Beginner to Intermediate.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on personal level experience and ability to work with tools.
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.

Guidelines for Replacing a Wall Thermostat

Replacing a Thermostat can be tricky, but it is possible when you follow these Guidelines

Common Thermostat Problems and How to Fix Them

More about Wiring a Thermostat

How to Install a Programmable Thermostat for Room Heating Unit

Electrical Circuit for Caret Baseboard Heaters: When we tried to convert from ceiling heat to a cadet baseboard heater we found three bedrooms were all on the same circuit.

Wiring Instructions for a Honeywell Thermostat: I bought a Honeywell Heating thermostat. There were no directions about how to wire it.

How to Install Electrical Wiring for a 240 Volt Wall Heater

Related Questions about wiring a thermostat


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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.



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FAQs Frequently Asked Questions and Comments

2 Responses to “How to Change a Thermostat”
  1. Jer says:

    I bought a cadet 6 foot baseboard heater and they sent me a 4 pole thermostat and I only need a 2 pole, how can I make the 4 pole one work? or can I?
    Thanks, Jer

    • Dave Rongey says:

      Hi Jer,
      The thermostat that you are describing is typically used to control the 240 volt circuit, consisting of the Line and Load circuit wiring. Please refer to the wiring diagram which is included with the thermostat of the baseboard heater.
      I hope this helps,
      Dave

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