rating iconrating iconrating icon

Gas Furnace Repair Costs

December 29, 2025
Gas Furnace Repair Costs

Most homeowners think of a furnace as a set-it-and-forget-it home appliance that operates quietly in the background – until something goes wrong. When something does go wrong, your first thought is probably the best way to keep your family warm and comfortable until necessary repairs can be made. Your next thought is likely to be your gas furnace repair costs.

Gas furnaces work via a pilot light that ignites the burners and circulates warmth through the air. Gas furnace repair costs vary according to the repair and can range widely from as little as $100 to as much as $1,000 or more. Having at least a general idea of the cost of your repair can relive anxiety and speed up the repair process considerably. Let’s look at a few of the most common causes of gas furnace repair and their costs.

Ignitor Replacement

Because it’s a brittle part that can break easily, replacing the ignitor on your gas furnace is a delicate job. When the ignitor detects a flame, it tells the furnace to turn on the gas supply. Our technician will locate and remove the faulty ignitor inside your furnace, install a new one, and run your furnace through a heat cycle. This repair typically takes up to three hours and can range in cost from $180 to $300.

Gas Valves

Replacing your furnace’s gas valves is a critical repair because the valves open and close to regulate the flow of gas to the pilot light and burner. The valves control the gas and prevent fires and explosions. Our technician will inspect your furnace and choose the right type and size valves. They’ll shut off the gas supply to your furnace, find and remove the nonfunctioning valves, install new ones, and ensure the furnace ignites correctly. This repair can cost between $280 and $470.

Flame Sensors

Your furnace’s flame sensors prevent unnecessary gas flow. To replace a defective flame sensor, our technician will turn off your furnace and allow the flame to cool before removing the broken sensor and replacing it with a new one. They’ll make sure it’s facing in the right direction near your pilot light, reconnect the sensor’s leads and replace the ignition. Depending on your furnace, this repair can cost between $180 and $250.

Furnace Motors

The motor in your furnace forces heated air from the furnace through the vents in your house. When the motor stops working, your home cools down quickly. Once they diagnose the problem, our technicians will remove and repair or replace your furnace’s motor. This might involve replacing the motor and fan, cleaning the filter, and testing the new assembly to be sure it now functions correctly. It can take between one and three hours to complete the repair or replacement with an expected cost of $400 to $700.

Thermostat Replacement

To replace your thermostat, our technicians turn off the power, remove your old thermostat and replace it with a new one. This is an ideal time to consider choosing a modern, programmable thermostat that increases energy efficiency. They’ll disconnect the wiring from the old thermostat, attach a new mounting plate, reconnect the wiring, and make sure everything works together properly. The cost for thermostat replacement varies from $180 to $400.

Most HVAC companies will charge a service fee to come to your home, inspect your furnace, and diagnose your repair. This charge is sometimes deducted from the cost of the repair. The best way to manage gas furnace repair costs is to keep your furnace in good working order with regular maintenance. Additionally, the age of your furnace and the frequency of its use can have a bearing on its repair costs. Purchasing a high efficiency furnace can also lower repair costs as well as lowering use and maintenance costs. A furnace with a high Annual Fuel Use Efficiency (AFUE) rating yields significant savings over the life of your furnace.

If your furnace is more than ten years old, requires frequent repairs, or is operationally inefficient, it might be time to consider a replacement, rather than a repair. For gas furnace repair cost, it goes without saying that the best and least expensive furnace repair is the one you can prevent through regular care and maintenance.

Whether you need regular, timely furnace maintenance or fast, reliable, affordable furnace repair, call LA Construction Heating & Air Conditioning at (818) 341-3406. We have the knowledge and experience you need to keep your home and family warm, safe, and comfortable. A broken furnace doesn’t have to be daunting. We’re here to help with any gas furnace repair cost. Call us today to get the peace of mind you deserve. To learn more about services our company offers, please visit our homepage.

Customer Reviews & Testimonials

Shape- Social Media IconShape BG CTA

New In Our Blog

Piggy Bank with cash falling out near AC

Why Load Calculations Are Essential for Heat Pump Installation in Los Angeles

Discover how Manual J load calculations ensure accurate heat pump sizing, better comfort, lower energy bills, and compliance with Los Angeles rebate and Title 24 requirements.

Piggy Bank with cash falling out near AC

Heat Pump Rebates in Los Angeles (2026): Complete Guide to HEEHRA, LADWP, Burbank, Glendale, Federal Tax Credits & More

See all heat pump rebates available in Los Angeles, including HEEHRA, LADWP, Burbank, Glendale, GoZero, SCE incentives, and the $2,000 federal tax credit

Piggy Bank with cash falling out near AC

Heat Pump Installation & Electrification in Los Angeles: Complete Cost, Rebate & Contractor Guide

Heat pumps are rapidly becoming the preferred HVAC solution for Los Angeles homeowners looking to reduce energy bills, improve comfort, and qualify for major California rebates. This hub is your complete, authoritative guide to everything you need to understand before replacing your AC or furnace with a modern heat pump — including costs, rebates, system sizing, and how to choose the right contractor.

Piggy Bank with cash falling out near AC

Heat Pump Installation in Los Angeles: How to Choose the Right Contractor

This guide explains how heat pump installation works in Los Angeles and what homeowners should look for when choosing a contractor. It covers installation requirements, common mistakes, certification and permit considerations, pricing factors, and how to avoid issues that affect comfort, rebates, and long-term performance—so you can make an informed decision before installing a heat pump.

Piggy Bank with cash falling out near AC

Why TECH-Certified Contractors Are Required for Heat Pump Rebates in California

If you’re considering a heat pump in California, this post explains one critical requirement most HVAC companies leave out: TECH certification. You’ll learn why the state requires TECH-certified contractors for rebates, how certification affects install quality and system performance, and what can go wrong if you choose the wrong installer. It also shows how TECH compliance protects you from denied rebates, poor airflow, and systems that can’t keep up with LA heat—so you can make a confident, informed decision before you install.

Piggy Bank with cash falling out near AC

The HVAC “$5,000 Rule” — A Simple Way to Know When to Repair or Replace Your AC

Learn how the HVAC $5,000 Rule helps you decide whether AC repair or replacement makes financial sense. Simple formula, expert guidance for LA homeowners.

We Install and Service All Major Makes and Models

{ "@context": "https://schema.org", "@type": "Organization", "name": "LA Construction Heating and Air", "url": "https://www.laheatingairconditioning.com" }