Alma Location
1210 East Superior St.,
Alma, MI 48801
Mon - Fri: 7:30 AM - 5:30 PM
Mt. Pleasant Location
120 South Fancher St.,
Mount Pleasant, MI 48858
Mon - Fri: 7:30 AM - 5:30 PM
ATS Fleet Service - Mt. Pleasant
1011 Industrial Drive,
Mt. Pleasant, MI 48858
Mon - Fri: 8:00 AM - 5:00 PM
Sat: 8:00 AM - 12:00 PM
ATS Fleet Service - Gaylord
1180 Milbocker Rd.,
Gaylord, MI 49735
Mon - Fri: 8:00 AM - 5:00 PM
Sat: 8:00 AM - 12:00 PM
ATS Fleet Service - Saginaw
3733 Wolf Rd.,
Saginaw, MI 48601
Mon - Sat: 8:00 AM - 5:00 PM

Alma, Gaylord & Mount Pleasant Auto Repair

Why Is My Car Heater Not Working?

While winter in Michigan can be fun for some people, others not so much. Many people dread the cold, and if your car heater is not working, it can make the experience even worse. If your vehicle stops blowing warm air, it can be due to any of the following mechanical issues:

Damaged Thermostat

A faulty thermostat is one of the most prevalent causes of heater failure. It may be stuck open or closed, and either way, the damage can extend to the engine's cooling system. 

Low Antifreeze

The second most common problem is low antifreeze. When your coolant levels diminish, it won't be able to move towards the heater core, and thus, your cabin remains cold. It also puts your vehicle at risk of overheating.

Faulty Heater Fan

The heater fan, the component that transfers heat into the cabin, can break or suffer an electrical short.

Broken Blower Motor

If the blower motor is broken, you might have issues setting the fan speed. In worst-case scenarios, you might not get any airflow at all.

Clogged Heater Core

While this is a more uncommon problem, debris and dust that make their way into the coolant system can clog your heater core. You may either need a heater core repair or replacement altogether.

Leaky Radiator

A punctured radiator could stop coolant from reaching your heater core and harm your engine if left unnoticed.

Inadequate HVAC Controls

All those car buttons, dials, or touchscreens connected to your HVAC system may not be triggering the heating process. It's best to have a professional mechanic repair these issues.

Faulty Wiring or Blown Fuses

Similar to defective HVAC controls, your vehicle's wiring could be broken or have a short. A technician with electrical experience should be able to diagnose and repair this problem with ease. 


A broken heater in the winter can make your winter commutes miserable. If you notice that your car heater isn't blowing warm enough or at all, please bring your vehicle to Alma Tire Service for repairs.

Alma Tire Service is committed to ensuring effective communication and digital accessibility to all users. We are continually improving the user experience for everyone, and apply the relevant accessibility standards to achieve these goals. We welcome your feedback. Please call Alma Location (989) 463-4088, Mt. Pleasant Location (989) 773-5626, ATS Fleet Service - Mt. Pleasant (989) 772-6231, ATS Fleet Service - Gaylord (989) 748-0000, ATS Fleet Service - Saginaw (989) 725-1072 if you have any issues in accessing any area of our website.