Why does my furnace start then shut off?

Most often a dirty flame sensor or an overheating limit switch from restricted airflow. Both are common and both are quick fixes.

Is a cracked heat exchanger repairable?

No — a cracked exchanger means replacement, because it can leak carbon monoxide into your home. We'd never patch one.

Furnace Trouble? We Fix It Safely

Ignition faults, dirty flame sensors, failed inducers, cracked heat exchangers — we diagnose the whole system and check combustion safety on every single visit.

(940) 290-3800

CO & combustion check included
Same-day appointments
Upfront pricing

4.9 from 1000+ local reviews

Sailor's technician inspecting system controls

Furnace Repair · Denton County, TX

Google Reviews

4.9

from 1000+ local reviews

Read All Reviews On Google

Neighbors, not customers

North Texas homeowners keep calling us back

“Steven from Sailor's helped out again! Always on time, always explains what he's doing, and always leaves the place tidy.”

Nick

Providence Village, TX

“He was very polite and explained everything — no upselling, no pressure. Just honest work.”

Kay

Krugerville, TX

“Absolutely awesome every time. We've used them for both HVAC and plumbing and never been disappointed.”

Verified customer

Aubrey, TX

$49

$49 HVAC Tuneup & Inspection

$49 per HVAC unit. (valued at $119)

$100 Off

$100 off any repair over $350

$0 Diagnostic Fee for any same day plumbing or HVAC repair

Comfort is one call away.

Book online in about a minute, or talk it through with a neighbor right now.

(940) 290-3800

How it works

Calm, predictable, and tidy

You'll know what's wrong, what it costs, and when it's fixed — before we pick up a tool.

Book & Inspect

We start with safety: heat exchanger, venting, and gas connections, before touching anything else.

Diagnose & Price

You see the failed component and the price to fix it before work begins.

Repair & Verify

Full heating cycle, temperature rise measured, CO verified safe.

(940) 290-3800

Since 1993

Family owned & operated

Free

In-home estimates

Same-Day

Appointments available

Licensed

TACLA56347C · MPL14200

Sailor's technician walking a homeowner through her options

Save while you're at it

Captain's Club — $199 a year

Two HVAC tune-ups a year, an annual whole-home plumbing safety inspection, up to 10% off repairs, and a $49 truck-roll fee instead of $89. The cheapest repair is the one you never needed.

Priority scheduling

Members go to the front of the line.

Members save

up to 5% off new equipment, too.

(940) 290-3800

Good to know

Furnace Repair questions, answered

Wondering how your furnace works?

Ignition, flame sensor, blower, limit switch — a no-heat call is almost always one of those four. Small repairs today can help avoid bigger problems tomorrow.

Ready when you are

Treating You Like Family

Let's Get Your Home Comfortable Again

Book online in about a minute, or call and talk to a neighbor who has been serving North Texas since 1993.

(940) 290-3800