What does a relay on a furnace do?
The electric relay in a furnace is responsible for relaying electrical power to the heating elements and the blower motor inside the furnace cabinet. The heating elements provide the heat to warm the air, and the blower motor sends this warmed air through the ductwork.
How much does a relay for a furnace cost?
A relay switch controls your furnace’s blower motor. The average cost to repair or replace a relay switch is $150–$300.
How do I know if my furnace fan relay is bad?
One of the first symptoms of a problem with the blower motor relay is a blower motor that does not function. As the relay is the switch that supplies current to the blower motor, if it fails internally, then power may be cut off from the blower motor circuit causing the motor to no longer function.
Where is furnace sensor located?
A furnace flame sensor is a very basic part of your furnace. It’s located on the burner assembly and is just a thin metallic rod. It’s usually bent, and it sits just in front of the pilot flame inside the furnace.
What does a relay switch do in a furnace?
What does a relay switch do in a furnace? The electric relay in a furnace is responsible for relaying electrical power to the heating elements and the blower motor inside the furnace cabinet. The heating elements provide the heat to warm the air, and the blower motor sends this warmed air through the ductwork. Click to see full answer.
Where is the relay switch on a furnace?
The job of a relay switch is to heat up the room to the desired temperature and then close down the valve once the room is warm enough. Sometimes the relay switch won’t close the heat valve even when the temperature has exceeded the room temperature.
What does a fan relay do on a furnace?
– Name: furnace fan relay wiring diagram – Hvac Fan Wiring Diagram Best Hvac Relay Wiring Diagram Save Basic Relay Wiring Diagram New Fan – File Type: JPG – Source: yourproducthere.co – Size: 1,006.27 KB – Dimension: 5000 x 3704
How does a faulty relay affect your electric furnace?
No power. 1.