Heating & Furnace Repair in Katy & Fulshear, TX

Q: Why is my furnace running but not heating?

This is commonly caused by a dirty flame sensor, failed igniter, gas valve issues, or airflow problems from a clogged filter. We test each component systematically to identify the root cause.

We Find the Problem. We Show You the Proof. Then You Decide.

Heater not working? Before recommending any repair, we diagnose the root cause and document our findings with photos and video. Whether you have a gas furnace, heat pump, or electric heat—you see exactly what we see.

Same-Day Service $129 Diagnostic Fee Photo Documentation

Is Your Heater Showing These Symptoms?

If you're experiencing any of these issues, your heating system needs professional diagnosis.

No Heat or Weak Heat

Furnace runs but air is cold or lukewarm
System won't turn on at all
Heat pump blowing cold air in heat mode

Safety Concerns

Gas smell near furnace
Carbon monoxide detector alerts
Yellow or flickering pilot flame

Unusual Operation

Short cycling (turns on/off repeatedly)
Strange noises (banging, squealing, rattling)
Burning smell when heat runs

How We Diagnose Your Heating Problem

Our systematic approach ensures we find the real problem—not just the obvious symptoms.

1

Safety & System Check

Verify thermostat settings, check for gas leaks (gas furnaces), and confirm power to the system. Inspect air filter and return air path.

2

Ignition & Combustion (Gas Furnaces)

Check igniter, flame sensor, gas valve operation, and burner flames. Verify proper combustion and inspect heat exchanger for visible cracks or corrosion.

3

Heat Pump Evaluation (If Applicable)

Check reversing valve operation, defrost cycle, refrigerant pressures, and auxiliary/emergency heat strips. Verify outdoor unit is switching to heat mode properly.

4

Electrical & Safety Controls

Test limit switches, pressure switches, inducer motor, and blower operation. Measure electrical components against manufacturer specifications.

5

Document & Explain

Document all findings with photos and video. Confirm observations and explain options before recommending any work.

Common Heating Repairs We Perform

Based on our diagnostic findings, here are repairs we may recommend—only when supported by evidence.

Ignition Components

Replace failed igniters, flame sensors, and hot surface ignitors when testing shows degradation or failure.

Gas Valve & Controls

Address gas valve issues, pressure switches, and control board problems when testing confirms the fault.

Blower & Airflow

Fix blower motor issues, capacitor failures, and airflow restrictions that prevent proper heat distribution.

Heat Pump Issues

Repair reversing valve problems, defrost issues, and heat strip failures—documented with pressure readings and photos.

What We Will NOT Sell You

Honesty means knowing when to say no. Here's what we refuse to do:

❌ Heat exchanger replacement without documented evidence of failure

❌ Part replacements without test results showing failure

❌ Full system replacement when a repair will solve the problem

❌ "Tune-up" upsells unrelated to your documented issue

Heating Systems We Service

We diagnose and repair all types of residential heating systems in Katy and Fulshear.

Gas Furnaces

Single-stage, two-stage, and modulating furnaces from all major brands including Carrier, Trane, Lennox, Goodman, Rheem, and more.

Heat Pumps

Standard heat pumps, dual-fuel systems, and mini-split heat pumps. We verify reversing valve operation and defrost cycles.

Electric Heat

Electric furnaces, heat strips, and auxiliary heat systems. We test elements, sequencers, and thermal limits.

Frequently Asked Questions

Why is my furnace running but not heating?

This is commonly caused by a dirty flame sensor (the furnace ignites but shuts down quickly), a failed igniter, gas valve issues, or airflow problems from a clogged filter. We test each component systematically to identify the root cause.

Why does my furnace keep turning on and off?

Short cycling can indicate a dirty filter restricting airflow, a failing flame sensor, overheating due to blower issues, or a faulty limit switch. We check all possibilities and document what we find before recommending a repair.

Is it dangerous to run a furnace that smells like gas?

If you smell gas, turn off the furnace and leave the house immediately. Call your gas company and do not turn on any electrical switches. Once cleared by the gas company, we can safely diagnose the issue—which could be a gas leak, cracked heat exchanger, or delayed ignition.

Why is my heat pump blowing cold air?

Heat pumps can blow cool air if the reversing valve is stuck, refrigerant is low, the outdoor unit is frozen, or the system is in defrost mode. We also check that the thermostat is set correctly and auxiliary heat is functioning.

How do I know if my heat exchanger is cracked?

Signs include soot buildup, strange odors, carbon monoxide detector alerts, or visible cracks during inspection. We visually inspect accessible areas and document any concerns with photos. Note: heat exchanger replacement claims should always be verified—we show you the evidence.

How much does heating repair cost in Katy?

Our diagnostic fee is $129, which is applied toward the repair if you proceed. Repair costs vary based on the issue—a flame sensor cleaning is very different from a control board replacement. We provide upfront pricing before any work begins.

Do you service all furnace brands?

Yes, we service all major furnace and heating brands including Carrier, Trane, Lennox, Goodman, Rheem, Ruud, American Standard, York, Daikin, and others. Our technicians are trained to diagnose and repair residential heating systems regardless of manufacturer.

See What We See

Every heating repair visit is documented with photos or video of our findings—flame sensors, igniters, burner flames, electrical tests, and more. You receive a transparency link via text where images appear in real-time, timestamped and GPS-verified. We explain what we see before recommending any correction.

Heater Not Working? We Can Help.

Same-day service available. See the problem before you pay for the fix.

📞 Call Now: 832-403-7466 Schedule Online