How do you bypass a circuit board on a furnace?

Quote from the video:
Quote from Youtube video: And then run a jumper wire on the 24 volt coil one from common over here tied in with my common. And then tie the other side to my G signal. And it should be able to power on this fan and bypass.

How do I connect my furnace fan to the thermostat?

Quote from the video:
Quote from Youtube video: Into the W terminal and the green wire into G or the fan tighten that one up as well. Okay. So we have the thermostat hooked up and then of course this wire goes into the wall and down to the furnace.

Does a furnace have a circuit board?

The circuit board is usually located in the furnace’s blower chamber near the bottom of the unit. This is where the circulation blower fan motor is mounted.

How do I run my furnace fan only?

Quote from the video:
Quote from Youtube video: So what do we do very simply take the bottom panel off of the furnace take this panel. Off. When you take it off reach in shot aside. And shut off the gas.

How do you hotwire a furnace blower motor?

Quote from the video:
Quote from Youtube video: We have a red or a white wire. And that is our Neutral. So that will always be connected to your neutral line from your 115 or 120 volt power supply. So that's your neutral.

How do you bypass an HVAC fan relay?

Quote from the video:
Quote from Youtube video: The easy way to do this would be to simply bypass the dead relay on the board and wire the blower motor directly.

What wire is the fan wire on thermostat?

Some of the other wires powering your thermostat include: R-wire – Power, usually red. G-wire – Fan, usually green. Y-wire – Cooling, usually yellow.

What color thermostat wire controls the fan?


This is the most typical thermostat wiring style, and it applies to systems that regulate both heat and air conditioning. The wires are typically arranged as follows: red for 24-volt hot, white for heat, yellow for cooling, green for the fan, and blue for common (although the common wire may be a different color).

Is it OK to run furnace fan constantly?

Running the furnace fan constantly won’t necessarily make it fail sooner. You can actually extend service life by keeping the fan on, provided that the equipment was properly installed, and your ductwork is correctly sized.

Is it OK to run HVAC fan continuously?

Constantly running the fan and filtering the air in your home has huge benefits for the health of your home’s inhabitants. 2. Reduced Dust. Running your system on constant fan will run air through your filter more often, reducing the amount of dust your family breathes in your home.

How does a fan limit switch work?

The fan limit switch tells the blower assembly when it is OK to blow the heated air. Once the fan limit switch has sensed that the air in the plenum is a suitable temperature (usually around 20 degrees above the room temperature) it engages the blower fan to distribute air.

What is the yellow wire on a furnace blower motor?

According to the new motor White = L1 (neutral), Black = High speed, Blue = Medium speed, Red = Low speed. Check the diagram on the old motor, to figure out which wires are which. From what I can see, looks like on the old motor: Black = High speed, Yellow = Medium high, Orange = Medium Low, Red = Low speed.

How do you jump a thermostat wire?

Quote from the video:
Quote from Youtube video: And we held onto the insulated part of the thermostat wire. And we jumped from R to W. If you had larger head screws. Here you could use alligator jumpers like this.

How do you wire a 3 wire blower motor?

Quote from the video:
Quote from Youtube video: But again most air conditioners have three terminals on the capacitor. Now the capacitor also also labeled with fan C. In turn for each of the three terminals. We're going to take our Brown wire.

What is the red wire on a motor?

What Do the Wire Colors Mean? Reading the label plate will give the exact wiring configuration based on your specific 115-volt motor. Typical wiring calls for a black wire for high speed, a red wire for low speed, and the white wire will be the neutral.

Why do some motors have 3 wires?

As there are three sets of coils, there are three wires – one for each set of coils so they can be individually energized. The ESC is what controls the sequence in which the coils are energized. Essentially, a brushless DC motor is a three-phase AC motor.

Where do thermostat wires go?

Thermostat Wiring Tips

The W wire is connected to your heating system. If your thermostat controls your heat, you will have a white wire. The Y wire is yellow and connects to your air conditioning compressor. The G wire is green and connects to the fan.

Where is the C wire on an old furnace?

Quote from the video:
Quote from Youtube video: The wire coming from outside from the condenser unit is only going to have two wires a red and a white looking like this. And those two are going to go to y. And c common on that terminal strip.

What happens if you wire a thermostat wrong?

Potential consequences of improper installation could include: Electric shock. Blowing a circuit breaker. Damaging the thermostat unit, the electrical system or even the AC/furnace unit itself.