Heating & Furnace Repair
Furnace Repair in
Lexington, KY
A furnace failure in a Kentucky winter isn't just an inconvenience — pipes can freeze in hours. HVAC Doctor responds fast, diagnoses accurately, and gives you a flat-rate price before any work begins.
24/7 — no overtime fees ever
$39 diagnostic this week only — KY Lic. HM07217
Gas & electric furnaces — all brands
Safety inspection included with every call
Furnace Problems We Diagnose & Fix
Most furnace failures trace back to a small set of components. We carry the most common parts on the truck so your heat comes back on the same day in most cases.
Ignitor Failure
The most common furnace repair. A cracked or failed hot-surface ignitor means the burner won't light. Typical replacement takes under an hour.
Dirty Flame Sensor
The flame sensor tells the control board that the burner is lit. When it's coated in residue, the furnace shuts down as a safety measure after a few seconds.
High-Limit Switch Trip
A tripped limit switch is almost always caused by a clogged air filter. We reset the switch and diagnose the root cause — not just the symptom.
Inducer Motor Issues
The inducer motor exhausts combustion gases. When it fails, the pressure switch won't close and the furnace won't fire. We test, repair, or replace.
Gas Valve Problems
If the burner won't ignite even with a working ignitor, the gas valve may not be opening. We test the valve and related wiring before recommending replacement.
Heat Exchanger Cracks
A cracked heat exchanger is a serious safety issue — it can allow combustion gases to enter your living space. We perform a full heat exchanger inspection on every furnace call.
Control Board Failure
The circuit board is the brain of the furnace. Control board failures are diagnosable but require careful testing — we don't guess and replace expensive parts unnecessarily.
Pressure Switch Issues
Pressure switches monitor draft and airflow. A faulty switch or blocked pressure tubing can prevent the furnace from running even when everything else is fine.
Blower Motor Problems
A failing blower motor means heat builds up in the heat exchanger and the system shuts down on high-limit. We test amp draw and replace when necessary.
Warning Signs Your Furnace Needs Repair
- Furnace runs but doesn't produce warm air
- Short cycling — turns on and off repeatedly
- Pilot light won't stay lit (older units)
- Yellow or orange flame instead of blue
- Unusual noises — banging, rattling, scraping
- Carbon monoxide detector alarm
- Dramatically higher gas or electric bills
- Uneven heat — some rooms warm, others cold
- Furnace won't turn on at all
- Age over 15 years with declining performance
Furnace Safety: What We Check Every Visit
A furnace that operates incorrectly doesn't just mean a cold house — it can mean carbon monoxide in your home. On every furnace call, we go beyond the presenting problem and check the components that matter for safety.
- Heat exchanger visual and pressure inspection
- Carbon monoxide test at registers and equipment
- Flue and venting for blockages or back-drafting
- Gas line pressure and valve operation
- Combustion analysis on gas units
- Safety switch and limit control function
No Heat? Call Now — Available 24/7.
Same pricing day or night. Diagnostic normally $99 — just $39 this week only. Ahmad or Ammar answers every call.
(859) 684-3259 — Available 24/7