Straight answers
Frequently Asked QuestionsPrices included.
Short answerQuick facts: the diagnostic is $89 (free for plan members), a tune-up is $135, the maintenance plan is $229 a year ($189 the first year), and we work Monday to Saturday, 8 AM to 6 PM with no overtime fees in Cumming, Alpharetta, Milton, Roswell and Johns Creek.
Quick facts
- Diagnostic
- $89 · free for plan members
- Tune-up
- $135 one system
- Plan
- $229/yr · $189 first year
- Repairs
- 1-year guarantee
- New systems
- 10 yr parts · 1 yr labor
- Hours
- Mon–Sat, 8 AM – 6 PM
Prices and visits
How much is a service call?
The diagnostic is $89 and is part of your repair total. On larger repairs such as a motor, coil or compressor, we quote one price that already includes it. Maintenance plan members pay no diagnostic fee.
How much is a tune-up?
$135 for one system, $220 for two and $295 for three. An AC tune-up is a 15-point inspection and a furnace tune-up is a 21-point inspection, each with a written report.
What does the maintenance plan cost?
$229 a year for one system, $349 for two and $459 for three, with $40 off the first year. It includes spring and fall visits, 10% off repairs, no diagnostic fee and priority scheduling.
Do you charge more for evenings or Saturdays?
No. We do not charge overtime fees. Hours are Monday through Saturday, 8 AM to 6 PM.
Do you charge for travel?
No. Prices are the same in Cumming, Alpharetta, Milton, Roswell and Johns Creek.
Repairs
How much does AC repair cost?
Most AC repairs cost $150 to $650 in total, including the $89 diagnostic. A coil or compressor runs $2,000 to $3,500.
How much does furnace repair cost?
Most furnace repairs cost $150 to $750 in total, including the $89 diagnostic. Larger parts such as a gas valve or blower motor run up to $1,900.
Do repairs come with a warranty?
Yes. Repairs carry a 1-year parts and labor guarantee.
Why is my AC blowing warm air?
Most often the outdoor unit is not running because of a failed capacitor or contactor, or the coil is frozen from low airflow or low refrigerant. Check the filter, thermostat and breakers first.
Should I repair or replace my system?
Multiply the age of the system by the repair price. Under $5,000, repair usually makes sense. Over $5,000, especially on older equipment, compare it with a replacement. We give you both numbers in writing.
New systems
How much does a new system cost?
Typical installed prices: AC $5,500 to $14,500, gas furnace $4,500 to $11,500, heat pump $7,500 to $16,500 and dual fuel $11,000 to $19,000.
Is the estimate free?
Yes. Estimates for new systems are free and written, with Good, Better and Best options you can compare on your phone and approve online.
What warranty comes with a new system?
The manufacturer's 10-year limited parts warranty, which we register for you, plus our 1-year labor warranty.
Can I finance a new system?
Yes. Financing with 0% APR plans is available, subject to credit approval. Your estimate shows the monthly payment next to the pay-in-full price.
How long does installation take?
Most replacements are done in one day. New installs with duct, gas line or electrical work usually take one to two days.
Is a heat pump a good fit for Georgia?
Yes, for many homes. A heat pump heats and cools with one system and works well in North Georgia winters, with backup heat for the coldest nights. Dual fuel adds a gas furnace for homes that have gas.
Care and maintenance
How often should I change my air filter?
Check a standard 1-inch filter every month and change it at least every 1 to 3 months. Thicker media filters last longer; follow the size printed on the filter frame.
How often does my system need maintenance?
Once a year for an AC-only or furnace-only system. Twice a year for heat pumps and for homes with both an AC and a furnace: spring for cooling, fall for heating.
How long does an HVAC system last?
Air conditioners usually last 12 to 15 years and gas furnaces 15 to 20 years, longer with yearly maintenance.
Why does my house feel humid with the AC on?
Often the system is oversized and shuts off before it removes moisture, or the fan is set to ON instead of AUTO. Two-stage and variable-speed systems control humidity best.
About us
Where are you located?
Our shop is at 105 Enterprise Dr, Suite E, Cumming, GA 30040. We serve Cumming and Forsyth County, Alpharetta, Milton, Roswell and Johns Creek.
Which brands do you work on?
We repair and maintain all major brands, including systems we did not install.
Who owns Cool Season?
Halis "John" Can, a former math teacher who trained in HVAC in 2016 and started Cool Season in 2017. Customers call him The Professor.
Are you licensed and insured?
Yes. Cool Season Heating and Cooling is a licensed and insured Georgia HVAC contractor.
Prices and details reviewed November 2026.
Ask us anything
Call (404) 416-6770 or schedule online.