How can I fix a broken car heater?

It’s getting colder again and my car’s heat doesn’t seem to blow warm air. Is this something I have to get fixed or can I fix a broken car heater myself?

I’m sorry to hear that you’re having trouble with your heater. Typically, a broken car heater can be due to several issues, none of which are particularly easy for the average car owner to diagnose and repair themself. Some common causes include:
  • Low antifreeze or coolant
  • A faulty heater fan, motor blower resistor, or thermostat
  • Issues with your wiring or a blown fuse
  • Broken HVAC controls
  • Leaky radiator or clogged heater core
Low antifreeze or coolant is one of the only causes you can easily repair yourself. You can purchase more antifreeze or coolant at an auto repair store and follow the instructions on the bottle. You’ll also want to reference your car’s manual to determine the amount you’ll need.
If replacing your antifreeze doesn’t work, you should bring your car to a mechanic for further diagnosis and repair.
Since winter and colder weather are coming, another way to protect your car is with a roadside assistance membership from Jerry.
Jerry’s membership provides you with industry-leading roadside assistance, including benefits like towing, lockout service, and a mechanics hotline. To find out if you’re eligible, you can check the app or call one of our friendly agents. You may qualify for a special rate of $50 for your first year!
Chloe Jenkins
Answered on Nov 11, 2021

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