Table of Contents
How do I know if my furnace control board is bad?
If a control board starts to break, you will notice some of the following signs of malfunction: Warning lights. Typically, control boards have LED indicators that function as warning lights. Temperature instability. Interruptions in the event sequence.
How do you test a furnace board?
How do you test a bad control board?
What are the Signs of a Bad Furnace Control Board? Warning lights on your furnace’s diagnostic system (see step 1 below) Temperature instability (especially when the thermostat is ok) and; Interruptions in the normal sequencing of your furnace.
How do you reset a furnace control board?
Follow these simple steps: First, turn off the power supply to the furnace by turning off the breaker in the circuit box. Locate the reset button on the furnace and press it to reset the furnace. If the button is popped up, press it down. Return the cover to the blower compartment and turn the power on.
How long should a furnace control board last?
A furnace circuit board lasts 10 to 15 years on average, depending on the furnace condition, usage, and level of maintenance.
When should I replace my furnace control board?
If it is already 15 years old, getting a new circuit board may only add another five years or so to the life of the furnace. On the other hand, investing in a new furnace means you will have between 15 and 20 years of life.
Are furnace control boards interchangeable?
Once you have identified a defective control board, you continue your control board replacement by finding the proper replacement. This can be achieved by finding the manufacturer’s part number or by using the furnace model and serial number. There are also universal controls that can be used for many furnaces.
What do you do when your furnace doesn’t turn on?
What to Do When Your Furnace Won’t Turn On Check Your Circuit Breakers. Even if you use a gas or propane furnace, some of the components run on electricity. Check Your Thermostat. Check the Drain Pan. Check Your Air Filter. Check the Pilot Light. Check Your Natural Gas or Oil Supply.
Do old furnaces have control boards?
Gas Furnace Control Boards This type of board is a simple ignition control board usually found in older units, which tend to be less energy-efficient. It controls the operation of the gas valve, ignitor, and flame sensor.
How much is a circuit board for a furnace?
A furnace circuit board replacement can cost between $550 – $1,100, depending on how complex your system is.
Where is the reset button on a furnace?
Locate the reset button on the furnace and press it to reset the furnace. It is usually located inside the blower compartment on the side of the blower motor. Be cautious as the housing may be hot. If the button is popped up, press it down.
How many times can I hit the reset button on my furnace?
Don’t hit “reset” more than twice. The process pumps oil into the burner chamber, where it can accumulate if you have no ignition. Then when the furnace finally does start, it can do so explosively. So if the button won’t reset, or quickly pops up again, it’s time to call a professional repair service.
Why is my furnace not blowing hot air?
First, check to make sure the thermostat is set correctly. You will want to make sure that the fan control is set to auto, and not ‘on’. If the thermostat appears set correctly, turn off your heater at the thermostat and check the filter. If the filter is dirty, replace it.
How do I reset my luxaire furnace?
Locate the dedicated circuit breaker for your Luxaire furnace in the electrical service panel of your home after you turn off the furnace thermostat. Flip the circuit breaker off, then turn it back on. Reset the thermostat and wait for the furnace to restart.
Why do control boards go bad?
Failed transistors: The transistors in the control board are susceptible to damage due to power surges, static electricity, and age. Transistors are often the first part of a control board to fail. Loose wiring: The vibrations of the furnace over the years can cause wiring in the control board to shake loose.
How much does a circuit board cost?
A circuit board typically costs from 50 cents to $300 dollars to produce, depending on your needs. The price to produce a circuit board has many different factors, and may depend on the number layers, complexity, quantity and components included on the board.
Why do circuit boards fail?
Environmental Factors: Exposure to heat, dust and moisture, accidental impact (drops and falls), and power overloads/surges can be causes of circuit board failure. However, the most damaging cause of premature circuit board failure is electrostatic discharge (ESD) at the assembly stage.
What is a motherboard on a furnace?
A furnace control board is its brain. It’s much the same as any computer circuit board. It operates all functions — and in the order they occur. It controls everything the furnace does during each heating cycle.
Is furnace worth replacing?
When a heating system ages, internal parts begin to wear down and run inefficiently. Replace: A furnace at the end of its lifetime is likely to incur frequent repairs and steep heating costs. If you have an older system that would require costly repairs to maintain efficiency, consider having your furnace replaced.
