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HVAC Thermostat Category IndexThermostats Category Index

How to Wire a Heat Pump for Control | Thermostat Wiring Guide

How to Wire a Heat Pump for Control - There may be a time when you will want to change your old heat pump thermostat with a new heat pump thermostat. We have other articles here that will help you with thermostat wiring. These other articles help you with thermostat...

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Two-Stage Furnace Air Conditioner Thermostat Control Problem

Two-Stage Furnace Air Conditioner Thermostat Control Problem | Hi I was wondering if you can help me with a two thermostat… because I don’t think my condenser is using the second stage…. I open the thermostat and see the jumpers, but is there a way you can...

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4 Wire or 5 Wire Thermostat Wiring Problem

Thermostat Terminal Designations Explanations - You are wiring a new thermostat or about to wire a new thermostat and you want to understand what the terminal designations are on your old and your new thermostat. Why is it such a mystery with these terminal...

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Data Logging Thermostats | HVAC Control

Honeywell Chronotherm Plus Thermostat - Trane XL19i Condenser - I have a Honeywell Chronotherm Plus 8624D running a Trane XL19i Air Conditioner with a Trane XV90 Gas Furnace - all installed new in new construction in 2003. Every winter, during the morning warm-up...

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Running New Thermostat Wire

4 Wire or 5 Wire Thermostat Wiring Problem - Question: We have a 19-year-old condo with an old Carrier mercury thermostat. We have both a natural gas furnace and an AC unit. There are only four wires going into the existing thermostat - red, green, blue, white. On the...

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Thermostat Wiring Colors Code | HVAC Control

Thermostat Wiring Instructions not Matching New - I have a slightly older Rheem unit with the typical slide temp adjuster thermostat. I want to replace the the old Thermostat with a digital, TP-N-721 from Vive Comfort that I have (not programmable, just...

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