Heating repair · North Georgia

Furnace Repair in Cumming, GAHeat back on today.

Short answerMost furnace repairs we do in Cumming and North Fulton cost $150 to $750 in total, including the $89 diagnostic, and are finished in the same visit when the part is on the truck. You see the diagnosis and approve the price before any work begins, and our repairs carry a 1-year guarantee.

Call (404) 416-6770

Furnace repair facts

Diagnostic: $89 · free for plan members
Most repairs: $150 – $750 total
Major parts: $800 – $1,900
Guarantee: 1 year on repairs
Overtime fees: None, ever
Hours: Mon–Sat, 8 AM – 6 PM
Brands: All major brands

Common furnace problems and what usually causes them

These are the calls we get most from October to March, with the cause we find most often.

Blowing cold air

The blower runs but the burners never light or shut off quickly. Most often a dirty flame sensor, a failed ignitor or a clogged filter tripping the high-limit switch.

Usual fix: Clean or replace the flame sensor, replace the ignitor

Will not turn on at all

No sound, no fan. Check the thermostat and the furnace power switch first. If both are fine, it is usually a blown low-voltage fuse, a door switch or the control board.

Usual fix: Fuse, switch or control board

Short cycling

Starts, runs a few minutes, shuts off, repeats. Common causes are a dirty filter, a weak flame sensor, or a furnace too large for the house.

Usual fix: Airflow fix or sensor service

Runs but the house will not warm up

Long run times with lukewarm air. Often a dirty filter, a blocked return, leaky ducts, or a two-stage furnace stuck on low.

Usual fix: Airflow check, staging check

Loud or new noises

Squealing usually means a blower motor bearing or belt. A boom at startup means the burners are lighting late and should be cleaned and adjusted.

Usual fix: Blower or burner service

Water around the furnace

High-efficiency (90%+) furnaces make water. A puddle means a clogged condensate line, trap or pump.

Usual fix: Clear the drain or replace the pump

Furnace repair costs

Typical installed prices for the parts we replace most. You get the exact price before we start.

Repair	Typical price
Flame sensor clean or replace	$150 – $300
Hot surface ignitor	$200 – $400
Thermocouple (older standing-pilot furnaces)	$150 – $300
Blower capacitor	$150 – $300
Inducer (draft) motor	$400 – $750
Control board	$400 – $800
Gas valve	$400 – $1,750
Blower motor	$800 – $1,900

Typical total prices, including the $89 diagnostic. Parts under manufacturer warranty can lower the price; we check your warranty before quoting.

Check these before you call

Five minutes here sometimes saves a service call.

ThermostatSet to Heat, set a few degrees above room temperature, and fresh batteries if it uses them.
FilterA filter you cannot see light through can make the furnace shut itself off. Replace it and wait 10 minutes.
Power switch and breakerThe furnace switch looks like a light switch near the unit. Make sure it is on and the breaker is not tripped.
Furnace doorIf the lower panel is not seated, a safety switch keeps the furnace off.
Condensate drain (90%+ furnaces)A full or clogged drain will stop a high-efficiency furnace. Look for water around the unit.

If you smell gas, leave the house and call your gas company from outside before calling us.

Repair or replace?

We give you both numbers and let you decide. A simple rule we use: multiply the furnace age by the repair price. Under $5,000, repair almost always makes sense. Over $5,000, especially past 15 years old, compare it with a new furnace. Most furnaces in North Georgia last 15 to 20 years.

How a repair visit works

BookCall (404) 416-6770 or schedule online. We confirm by call or text.
DiagnoseWe test ignition, airflow, safeties and gas pressure, and show you the failed part.
ApproveYou get the repair price before we start. No overtime fees.
Fix and testWe repair it, run a full heating cycle and clean up.

Questions we hear

How much does furnace repair cost in Cumming?

The diagnostic visit is $89 and is part of the repair total. Most furnace repairs cost $150 to $750 in total. Larger parts such as a gas valve or blower motor run $400 to $1,900 installed. You approve the price before any work starts.

Can you repair my furnace the same day?

Often, yes. Common parts such as flame sensors, ignitors and capacitors are on the truck. If a part has to be ordered, we tell you the timing before you approve.

Why is my furnace blowing cold air?

The most common causes are a dirty flame sensor, a failed ignitor, or a clogged filter that makes the furnace shut its burners off. Check the filter and thermostat first.

Do you charge extra on Saturdays?

No. We do not charge overtime fees. We work Monday through Saturday, 8 AM to 6 PM.

Do your repairs have a warranty?

Yes. Our repairs carry a 1-year guarantee, and parts still under the manufacturer warranty are covered by that warranty.

Which areas do you cover for furnace repair?

Cumming and Forsyth County, Alpharetta, Milton, Roswell and Johns Creek.

Prices and details reviewed November 2026.

Furnace acting up?

Upfront price, 1-year repair guarantee, no overtime fees.

(404) 416-6770