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Why Isn't My Car Heater Working?

It's a beautiful but cold morning, and you have errands to run. On entering your vehicle and driving off, you suddenly realize the heater is blowing out cold air rather than warm air. You are bound to be frustrated and cold. It could even be downright unbearable. To make it worse, you can't even defrost the mirrors and windows to get rid of condensation. A car heater that isn't working can be the bane of your existence.

So, why isn't the heater working?

Your car heater can stop working due to several reasons:

Ineffective cooling system

Your car's cooling system works like a radiator. Once you ignite your vehicle, the engine heats up to a certain temperature. With the aid of the thermostat, it heats the coolant that is made up of a 50/50 percent ratio of antifreeze and water. The mixture passes through the heating core, and then a fan blows the warm air from the core into the cabin of your vehicle. If the level of the coolant is too low, there's air in the system, or the core isn't working, making the car heater ineffective. If the coolant contains contaminants, it may also prevent the distribution of heated air within the cabin.

A defective fan

Once the fan stops working, heated air will not reach the cabin of your vehicle. Listen in to determine if the fan is running. If you don't hear anything, then the fan is your culprit. A defective fan could be the result of a blown fuse. You may need to replace either the fuse or the fan itself.

Dysfunctional thermostat

If the thermostat gauge is stuck on the 'C,' especially after the engine has had enough time to warm up, then your thermostat is broken. This means it isn't opening up to allow coolant through it to form the core. A dysfunctional thermostat may cause your vehicle to overheat, so consult a technician and have it replaced as soon as you can.

Problems with the heater core

Another possible culprit for your car heater not working is associated with heater core difficulties. The heater core is a cooling system part made of aluminum or brass that carries hot coolant in and out alongside the fans that disperse heat brought in by the coolant. They are responsible for heating and defrosting. Telltale signs that show the heater is not working include fog inside the car, an overheating engine, a fruity sweet-smelling odor, or your car using up coolant very fast.

Water leaks

There are many different places in your car from which leaks can surface. Check your radiator, hoses, and water pump for any damages. If any of these parts are leaking, the car heater will not work correctly.

An effective heating system makes a ride during the cold season much more enjoyable. If you notice any of these heating issues, bring your vehicle to our reputable auto repair shop today for expert attention.

Love the service ! Friendly staff ,Fast and efficient. On line booking makes it convenient .
Terri M.
Have been going to Lex Brodie's for tire and alignment work for over 40 years and they have been outstanding. Sure, I've experienced a few "quirks" with them, but that also happens with any other best other shops taking care of them in good order.
Alan Y.
Yelp: Jack and the girls at the front took really good care of me and my mom. They are professional and probably one of the most honest mechanic shops I have been to. You can tell they really want to make their customers happy and give them the most fair price they can. Jack and the sales girl I talked to broke down all the costs before starting the work so I knew exactly what we were paying for. Great staff, patient, kind, and honest. This place treats you like family and wants you to leave happy.
Kai C.
Staff are always very friendly and range of services is convenient. I also like the online reservation system, and the waiting area is great, too.
Mark S M.
I am very happy with great customer service and friendly staff at Waipahu location and highly recommed. They take pride in taking care of there customers. And they honor military discount. Mahalo
Abdul R.
Yelp: These folks are fantastic. GREAT CUSTOMER SERVICE!!! I truly enjoy my visits to this location and my interactions with the employees! All smiles!
Eric H.
I always receive great service from this location. Today I had Jack and he was awesome. He explained the services and pricing. Extremely helpful. The woman who cashed me out (ugh I wish I got her name) was so kind and courteous, too! 5-stars all around! Mahalo!
Lisa U.
Thank you for always taking care of my car. consistently respectful, good communication. Thank you for fitting me in and keeping it transparent
Catherine M.
I have been a Lex Brodie client for over 20 years. Today, I still get the same great service every single time I’m there!
Carlin K.
This was my first visit with Lex Brodie Kaneohe branch and I’m sold as a forever customer. The manger Gerard and his staff treated me like Ohana. I highly recommend Lex Brodie Kaneohe branch if anyone needs tire and/or brake service. They are the best. Mahalo🤙🏽🙏🏽
Ken Y.
Great experience. Very easily scheduling online, the service advisor explained exactly what they would do, and they got done quicker than expected!
James P.
I am very satisfied with the service at Lex Brodie’s. The staff were all very helpful and the work was completed timely and for the estimated price.
Robert R.
First time at lex Brodie’s it was excellent service and the girls at the front were really helpful.
Ronald & Sally H.
Wonderful, quick service. My low tire pressure light came on while driving to work downtown. I was able to make an appointment to drop off my car at lunch and picked it up after work. No charge for checking my tires and the employees were extremely friendly and efficient even though they were busy.
Judy C.
Easy online appointments, quick in person check in and drop off. Car was running great! Thank you for the quick service. Will always come back to Lex Brody's.
Douglas C.
Yelp: Great crew as usual. Professional, knowledgeable and just plain cool to do business with.
Richard A.


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