Chevy Bolt Heater Not Working – How To Fix

By Max Anthony •  Updated: 12/17/22 •  3 min read

Chevy Bolt Heater Not Working

Live Mechanic Help 24/7
Chat With A Mechanic Online

Connect with a verified mechanic in minutes. No appointments. No high fees. No waiting. Get back on the road and enjoy the ride.

Many Chevrolet Bolt drivers will experience heater problems at least once in the course of the ownership of the vehicle. If you have a heater that doesn’t let you blow hot air when it is on, then you have a problem. Here is a guide to help fix your heater so that you can use it again when the cold weather hits.

Causes of Chevy Bolt Heater Not Working and How to Fix It

Sometimes it is difficult to diagnose what is causing the issue, as there are a number of things that you can look into. Here’s what you need to do when your Bolt’s heater suddenly stops operating as it ought to.

Coolant Level

Sometimes coolant levels may fall to the point that a heater is not working properly. If you have a system that doesn’t have sufficient coolant, heat can be pumped to the heater core more efficiently. There will also be less hot air coming in to heat up the interior of the vehicle.

This is easy to fix; simply fill the engine compartment with enough coolant to maintain the correct temperature. Coolant levels may be low, but it could be caused by many things. Low coolants may be due to something as basic as a leak, or it could indicate a more serious problem.

Blown-Out Fuse

A defective heat exchanger may be caused by a faulty fuse which blows on the control valve. It is possible that the heating system is blowing cold, but not warm or even a little warm air; that could be the result of a faulty fuse.

Live Mechanic Help 24/7
Chat With A Mechanic Online

Connect with a verified mechanic in minutes. No appointments. No high fees. No waiting. Get back on the road and enjoy the ride.

Check that the control valve fuse is in the appropriate place on the electrical panel and if it is faulty, get it replaced.

Control Valve Failure

The control valve on your Chevy Bolt turns on the heat flow into the heater core like a switch. Functionality cannot be recovered if the control valve is broken; a replacement must be installed. The temperature does not change when

Fan Motor Failure

Defective fan motors could be the reason why there is no heat in the cabin. The heater is driven by a fan that blows air around the cabin, and heat from the hot air inside the car is driven outward. If there’s no noise from the exhaust fan (or if no air is blowing very hard), you may need to replace the fan motor.

Heater Core Blockage

Unable to access the core of the heater may cause the entire system to malfunction. Blockages in the channels through which the engine coolant is circulated will cause the engine to become very hot, and no heat will be able to be pushed to the interior of your car. If it is the case, you may need to replace the hose.

Regularly maintaining your car and testing the coolant levels will help keep it from having major issues. When winter comes, make sure that your car is working properly so that you can stay warm and dry inside your car even when it’s cold outside.

(Visited 37 times, 1 visits today)

Max Anthony

Max is a gizmo-savvy guy, who has a tendency to get pulled into the nitty gritty details of technology and cars. He attended UT Austin, where he studied Information Science. He’s married and has three kids, one dog and a GMC truck and a Porsche 911. With a large family, he still finds time to share tips and tricks on cars, trucks and more.

Keep Reading