how much does it cost to change a thermocouple on a furnace

Thermocouple Replacement A thermocouple costs about $150 to $250 to replace. This is an important part of a gas furnace since it opens the gas line when the pilot light is lit and will close the gas line when it’s not.
how much does it cost to change a thermocouple on a furnace

Furnace heat exchanger repair estimate

A heat exchanger replacement costs $1,000 to $3,000, depending on the furnace size, age, and brand. Most HVAC technicians replace heat exchangers instead of repairing them due to possible carbon monoxide leaks.

Furnace short-cycling repair cost

Furnace short-cycling repair costs $100 to $400. Short-cycling happens when the furnace shuts off too quickly before reaching its thermostat setting. Common fixes include replacing the flame sensor, circuit board, or thermostat.

Other causes include:

  • Clogged air filters
  • Blocked heat grates, exhaust fan, or vent
  • Damaged fan-limit switch
  • Ignitor or flame-sensor failure
  • Dirty or faulty blower-motor wheel
  • Oversized furnace

Furnace – Thermocouple | Repair and Replace

FAQ

How much does it cost to replace a furnace thermocouple?

Thermocouple. If your furnace is an older model with a pilot light, it relies on a thermocouple to shut off its gas valve if the flame goes out. The average cost to repair or replace a thermocouple is $100–$250.

What is most expensive part to replace in a furnace?

It’s no doubt that some home systems can be quite expensive to replace, and a furnace is no exception. The three most expensive parts on a furnace are the blower motor, the circuit board and the draft inducer motor.

Can I replace a furnace thermocouple myself?

Replacing a thermocouple is a relatively easy fix that can take less than two hours. This guide reviews how to replace a thermocouple to ensure gas appliances stay in good working order, as well as how to relight a pilot light.

What are the symptoms of a bad thermocouple on a furnace?

If your furnace has a bad thermocouple, you may not be able to turn it on. The thermocouple may completely close the gas valve as a failsafe. Even if the pilot light is lit, the gas valve won’t open. You can perform a visual inspection of the thermocouple.

How do you replace a thermocouple on a gas furnace?

A screwdriver, adjustable wrench, and potentially a nut driver are typically required. Additionally, ensure you possess a replacement thermocouple that aligns with your furnace’s specifications. Safety takes precedence. Initiate the process by shutting off the furnace’s gas supply.

Can I repair or replace a thermocouple on my own?

Attempting to repair or replace a thermocouple on your own can be challenging. It’s essential to properly turn off the gas valve and power the furnace. If unsure, consulting with a professional is advised for safe and effective replacement. A thermocouple is an essential component in gas furnaces, acting as a safety device.

Do gas furnace thermocouples need to be replaced?

Gas furnace thermocouple issues can manifest as bad signs, cause malfunction, and may necessitate replacement. Recognizing these signs and understanding the causes can help in timely and effective replacement. A thermocouple in a gas furnace is a safety device that shuts off the gas if the pilot light goes out.

How much does it cost to replace a thermocouple?

1. DIY Replacement: If you have the necessary tools and skills, you can choose to replace the thermocouple yourself. Thermocouples are relatively affordable components, typically ranging from $10 to $30, depending on the brand and quality.

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