4 Wire or 5 Wire Thermostat Wiring Problem Step

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.

The thermostat has a total of four wire leads: two marked LINE that connect to the circuit feed wires entering the box from the circuit breaker panel, and two marked LOAD that connect to the circuit wires that run onward to the heater. The thermostat's wire leads are often red and black—a color-coding that indicates that all wires carry hot ...

A thermostat is designed to control the temperature of a heating or cooling unit in the home. Replacing an outdated four-wire thermostat with a newer model that uses two wires is not complicated, once you purchase the thermostat from a home-and-garden shop or hardware store.

Step 4. Connect the supply grounding wire to the green grounding screw, if you have not already done so. Step 5. If not already present, route supply wire from the circuit breaker to the thermostat wiring box, and from the thermostat wiring box, to the heater, for later use. Step 6.

Variety of 4 wire thermostat wiring diagram. A wiring diagram is a streamlined conventional pictorial representation of an electrical circuit. It reveals the parts of the circuit as streamlined shapes, and the power and also signal connections in between the gadgets.

The common wire, sometimes referred to as the c-wire, is what’s responsible for delivering constant power to your thermostat. For programmable thermostats and smart thermostats, c-wires are essential for setting a schedule or having your heat or air conditioner turn on at a desired temperature.While some units can run without a c-wire, even brands like Nest recommend having one for optimal ...

It’s a non-programmable thermostat that’s simple to use. 240 volt wiring, on the flip side, may not require a neutral white wire. Both of these service wires come in the panel together with a ground wire ( typically the ground is a whole lot of strands that surround the hot wires). A neutral wire isn’t utilized within this circuit.

John Lamb/Getty Images. Electric baseboard heaters are good for spot-heating areas of your house that central HVAC does not reach. If you are going to put in a baseboard heater, make the thermostat set-up the best you can by separating it from the heater body.This provides more accurate temperature gauging, plus it makes it easier for users to access the thermostat.

How to wire a Honeywell thermostat with 4 wires. Example of a Honeywell Smart Thermostat RTH9580WF wall plate, mounted, with 4 wires connected. Example of No Common Wire Thermostat. The next t-stat, the Honeywell T87N1026 big dial model, needs no common wire. So the G wire here does control the HVAC fan.

Wiring a Baseboard Heater Thermostat Electrical Question #1: How do I wire a baseboard heater and thermostat?. I have a HHBT-2 thermostat that is for a 220 volt baseboard heater. I need to know what black and white wires connect to the source and the black and red wires that connect to the heater.