Ashburn, VA

How much does a furnace gas valve replacement cost?

$200 – $800 average replacement cost

Get free estimates from furnace repair services near you, or view our cost guide below.

December 27, 2021

Reviewed by Tom Grupa and 3 expert furnace repair services on HomeGuide.

Furnace gas valve replacement cost

A furnace gas valve replacement costs $200 to $800 on average. Furnace gas valve prices are $75 to $300 for the part alone or up to $600 for original manufacturer parts (OEM). Gas valve replacement labor costs $125 to $500. Furnace gas valve repair costs $75 to $200.

Furnace gas valve replacement cost - chart
Furnace gas valve replacement cost - chart

Furnace gas valve replacement cost
National average cost $500
Minimum cost $125
Maximum cost $1,000
Average cost range $200 to $800

Cost data is from research and project costs reported by HomeGuide members.

Furnace gas valve prices by brand

Furnace gas valve prices are $50 to $300 on average or up to $600 for original manufacturer parts (OEM) without installation. Gas valve prices depend on the type and brand.

Furnace gas valve prices by brand
Brand Valve price Total replacement cost
Armstrong / Lennox / Ducane $75 – $500 $200 – $1,000
Carrier / Bryant $80 – $600 $200 – $1,100
Goodman / Amana $70 – $165 $195 – $665
Heil / Tempstar $50 – $550 $175 – $1,060
Rheem / Ruud $80 – $300 $200 – $800
Trane / American Standard $60 – $325 $185 – $825
York $95 – $240 $220 – $740
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Furnace gas valve part up close
Furnace gas valve part up close

Gas valve for furnace cost factors

The cost of replacing a furnace gas-control valve depends on the valve type, brand, part availability, furnace accessibility, and local labor rates.

Cost factors to replace gas fireplace valve
Factor Average cost
Gas furnace valve part $75 – $300
Replacement labor $125 – $500
Total $200 – $800

Additional cost factors include:

  • Furnace type – Gas valves for two-stage and modulating heat furnaces are more complex and cost more than single-stage valves.
  • Brand – Universal parts are cheaper while original manufacturer parts (OEM) cost more.
  • Electronic vs. standing pilot – Valve prices for electronic ignition systems are typically higher than for standing pilot lights.
  • Propane/natural gas valve conversion – Conversion kits cost an additional $50 to $100 on average.
  • New wiring – A basic gas-valve wiring harness costs $20 to $50 and is typically necessary when replacing a very old gas valve.
  • Accessibility – Hard-to-reach furnaces increase labor costs.
  • Warranty – Most furnace warranties cover parts for 5 to 10 years, but not labor.
  • Location – Labor rates are higher in metropolitan areas than rural areas.
  • DIY vs. professional – DIY heater gas-valve replacement saves $125 to $500 in labor cost but typically voids active warranties.
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Furnace gas-valve replacement labor cost

The labor cost alone of a furnace gas valve replacement is $125 to $500 when hiring a certified HVAC technician.

Furnace gas valve repair cost

A furnace gas valve repair costs $75 to $200 for diagnostics, valve cleaning, and tightening connections for minor problems. However, a faulty gas valve that needs internal repairs requires a full gas valve replacement. Only the part manufacturer can legally repair a gas valve for safety reasons.

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Cost to replace gas fireplace valve

The cost to replace a gas fireplace valve is $300 to $500 on average, including a full fireplace inspection and diagnostic tests. The total cost depends on the valve brand and fireplace accessibility.

Frequently asked questions

What is the gas valve on a furnace?

The gas valve on a furnace opens or closes to regulate the gas flow to the pilot light and burners. A properly functioning gas valve is necessary to stop gas leaks and maintain indoor temperatures. Gas-valve designs are specific to different furnace makes and models.

Furnace gas valve types
Type Features
Gas chain valve system
  • Separate components
  • Manual “on” & “off” valve controls
  • For single-stage furnaces
Combination gas valve
  • Single unit
  • Automatic & manual valve controls
  • For single-stage, two-stage, & modulating units
Smart valve
  • Contains a self-monitoring circuit board
  • Combination gas valve
  • Direct ignition or pilot ignition
  • Ignition device is part of the unit
  • For single-stage, two-stage, & modulating units
Shut-off valve / safety valve
  • Gas shut-off lever on the main gas pipe leading to the furnace
  • Additional manual control of gas flow for emergencies

Gas valves must be compatible with the furnace’s blower-motor type:

  • Single-stage blowers have one high-heat setting only.
  • Two-stage blowers have either low- or high-heat settings.
  • Modulating blowers have variable heat settings for precise temperature control.

How to know if a furnace gas valve is bad

If a furnace gas valve is bad, there will be no warm air coming from the furnace, or it will shut down completely. Faulty gas valves are a major safety concern. Contact an HVAC technician to test the valve and diagnose the source of the problem.

Are furnace gas valves interchangeable?

Some furnace gas valves are interchangeable between propane and natural gas models, depending on the furnace brand, location, type, and local building codes.

Tell an HVAC pro the exact make, model, and size of the existing valve to get the best recommendation for compatible parts.

How long does it take to replace a furnace gas valve?

Replacing a furnace gas valve takes 30 to 60 minutes on average or up to 2 hours for hard-to-access locations like crawlspaces and small attics. This time includes HVAC diagnostic tests. Most technicians charge a minimum service fee regardless of the time spent.

Where to buy a furnace gas valve

Buy a furnace gas valve from Amazon, Walmart, or HVAC distributors and service companies for the widest selection. Buying directly from the manufacturer typically costs more but ensures an exact match.

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Hiring a furnace repair service

Before hiring a furnace repair service near you, be sure to:

Questions to ask

  • Can you show me a list of references?
  • Do you provide free estimates?
  • How long will the job take?
  • Can you recommend ways to increase the efficiency and lifespan of my furnace?
  • Do you offer a full furnace cleaning as well to prepare my system for winter?
  • How can I help prevent gas leaks in my furnace?
  • Will you use original equipment manufacturer parts?
  • Do you offer an HVAC maintenance plan? If so, what does it include?
  • What does your warranty or guarantee include?
  • Will you provide a written report summarizing the repairs and maintenance?

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