Causes of a breakdown A heater can stop working for a number of reasons, including: A low antifreeze/water level in the radiator due to a leak in the cooling system. A bad thermostat that isn't allowing the engine to properly warm up. A blower fan that isn't working properly.When the coolant level is getting low, the core stops working, or there is air in the system, your car heater may not run. The coolant can be an issue too. If the coolant has rust particles or other contaminants, it prevents the heating core from spreading heated air into the cabin.
Why is my car heater not working?
A leaky radiator could prevent coolant from reaching your heater core and could damage your engine, at worst. Simply put, your car’s buttons, knobs, or haptic feedback touchscreens may not be triggering the heating system. Shorts, broken dials, and bad touchscreens can all lead to malfunctions that prevent your heater from working.
Is it dangerous to have a non-functional car heater?
Having an absolutely non-functional heater can be a potential safety hazard So, below you can have a glimpse at some of the top reasons why your car heater not working and what can be done to fix it. Why isn’t your car’s heater working?
Can I Fix my car heater myself?
If the problem as to why your car heater is not working is simple - and you can diagnose it - then it's possible to fix it yourself. But some issues are more complex, meaning a visit to your local garage is necessary.
Why is my car’s heater blowing cold air?
The second-most common issue is low antifreeze or coolant. When your coolant/antifreeze levels drop, the hot fluid can’t make it to the heater core, and thus, your cabin remains chilly. This can occur if the engine is working too hard and overheats or if it wasn’t properly filled. A close up of your HVAC controls.
Below you will find two interesting articles on a similar topic 👇How do you unclog a clogged heater core?
Can a clogged heater core cause a car to overheat?