Car Heater Not Working - Troubleshooting Repair Tips
When a car heater doesn't work, the most common cause is low coolant. When troubleshooting to try and repair the car heater, check the coolant ONLY when the engine is cold. That's because removing the coolant cap on a hot pressurized system can result in severe burns. If a cooling system is full and there's still no hot air coming from the vents, there could be air trapped in the system. A Lisle coolant funnel may be used to burp air out of the system if the pressure cap goes directly on the radiator in your system. If the pressure cap is located on the reserve bottle and not the radiator the Lisle funnel will not help. The bottle in that case does the same thing as the funnel as explained in the repair video. However a Vacuum fill system can be used to fill cooling systems and eliminates air being trapped by using vacuum and the coolant is drawn into the system. The link to our car repair article with more tips and tools mentioned in the video is here - https://www.wiseautotools.com/blog/ca...