What furnace repair costs in Houston
Most Houston furnace repairs run $150 to $700 flat rate. A flame-sensor cleaning is $150 to $250, an igniter replacement $250 to $450, a pressure switch $180 to $320, an inducer motor $400 to $750, a gas valve $350 to $700, and a control board $350 to $800. The precise price depends on your furnace brand and age, and you approve it before we start.
Furnace repair cost by part (2026)
Flame sensor (clean or replace): $150–$250. Igniter: $250–$450. Pressure switch: $180–$320. Inducer motor: $400–$750. Gas valve: $350–$700. Control board: $350–$800. Thermostat: $200–$500. Heat exchanger: $1,200–$3,500 (the one that usually means replace). All prices are parts + labor, flat-rate.
Why the heat exchanger is the decision point
A cracked heat exchanger is the one repair where the price usually doesn't make sense — $1,200 to $3,500 to replace it in an older furnace is often half the cost of a new system. When we find a cracked exchanger, we show you carbon-monoxide risks plainly and let you decide, but we won't patch a cracked exchanger, because that's a safety line for us.
Flat-rate vs. hourly furnace repair
We don't bill furnace work by the hour. You get one fixed price for the complete repair after diagnosis. That means a slow diagnosis or a parts run doesn't run up your tab — the price you approve is the price you pay.
Frequently Asked Questions
How much does furnace repair cost in Houston?
Most furnace repairs run $150–$700 flat rate. A flame-sensor clean is $150–$250, an igniter $250–$450, and a gas valve $350–$700.
What's the most common furnace repair?
A dirty flame sensor, which causes the furnace to start and then shut off. It's usually a $150–$250 fix and can often be cleaned rather than replaced.
Is a cracked heat exchanger a 'repair or replace' situation?
Replace. At $1,200–$3,500 to swap a heat exchanger in an older furnace, most homeowners come out ahead with a new system and a full warranty.
Do furnaces need the same urgency as AC in Houston?
Yes during cold snaps. A furnace that fails on a rare freezing night is a real emergency, especially with a gas-furnace carbon-monoxide angle. We dispatch 24/7 the same way we do for AC.
These are honest Houston market prices HVAC247PRO quotes every day. Serving Houston, Katy, Sugar Land, Cypress, Pearland, Spring, The Woodlands, Humble, Kingwood, Baytown, Pasadena, League City, Friendswood, Conroe, Tomball and the rest of the metro, 24/7. Call (346) 451-1559 or book an inspection — you'll get one flat price, no hourly meter, no surprises.