When winter arrives in the UK, a functioning car heater is more than a luxury—it’s a necessity. A car heater not working properly can leave you shivering during your commute and compromise your safety.
But how can you understand why your car’s heater is malfunctioning? Don’t worry. We’re here to help at Bromley Vehicle Test Centre. In this guide, we’ll cover common car heating system problems, their causes, and practical solutions to help you get back on the road with a warm cabin.
Are you looking for professional car servicing in Bromley? Bromley Vehicle Test Centre is ready to diagnose and fix your car heater problems with expert care and fast, reliable service. Contact us today on 020 8460 6666 or email us at to get your vehicle winter-ready!
Professionals at Bromley Vehicle Test Centre offer expert diagnosis and reliable repairs to keep your car's heating system functioning smoothly in winter.
Why Is Your Car’s Heater Not Working?
When your car heater isn’t working, it can be due to several underlying causes. The most common problems include low coolant levels, a faulty thermostat, or issues with the blower motor. Let’s take a closer look at these possible causes:
1. Low Coolant Levels
Low coolant levels are among the most frequent reasons why a car heater is not working. Coolant circulates through the engine and heater core, where it is heated before being blown into the cabin. If the coolant level is too low, there won’t be enough to heat up, so you’ll end up with cold air instead of warm air. You should always check your coolant level and top it up if necessary. It’s best to do this when the engine is cool to avoid burns.
2. Faulty Thermostat
Your car’s thermostat controls the flow of coolant through the engine. If stuck in the “open” or “closed” position, it can prevent the engine from reaching the correct temperature. As a result, your heater might not blow hot air. A faulty thermostat can also cause overheating or underheating issues with the engine. If you suspect the thermostat is the problem, it’s crucial to have it checked by a professional.
3. Clogged Heater Core
The heater core functions like a small radiator, warming the air through it. Over time, the heater core can become clogged with debris, rust, or sediment, blocking the coolant from flowing properly. This can result in no heat or cold air blowing from the heater. Cleaning or replacing a clogged heater core is often necessary to restore your heater’s functionality.
4. Blower Motor Issues
If your car heater isn’t blowing hot air despite everything else seeming normal, the issue may lie with the blower motor. If the motor is faulty or the fan isn’t working properly, the warm air from the heater core can’t be circulated into the cabin. You’ll notice this when you turn on the heater, but no air comes out, or only weak air is blowing.
5. Broken Heater Control Valve Or Knob
If the heater control valve is faulty, you may be unable to adjust the car’s temperature. A malfunctioning heater knob or valve can prevent the heater from switching on or allow it to only work at certain temperatures.
How To Fix Your Car’s Heater
Now that we know what might be causing your car heater to not work, let’s go over how you can troubleshoot and fix these issues. If the problem is simple, like low coolant or a clogged air filter, you may be able to fix it yourself. Bringing your vehicle to an expert for more complex issues is best.
Before you move ahead, read our blog about the basics of car maintenance.
Step 1: Check Coolant Levels
A simple but effective way to start is by checking the coolant levels in your car. If the coolant is low, top it up according to the manufacturer’s instructions. Use the right coolant for your vehicle, as using the wrong one can cause further problems. If the coolant keeps draining quickly, this could indicate a leak in the system.
Step 2: Inspect The Heater Core
If you suspect the heater core is clogged, it may require cleaning or replacement. Flushing the heater core with water can often clear debris and restore the coolant flow. However, replacement might be necessary if the core is severely blocked or damaged.
Step 3: Test The Blower Motor
Check the blower motor by turning on the heater and listening to the fan. If you hear no sound or notice strange noises, this could mean the blower motor is malfunctioning and needs to be repaired or replaced.
Step 4: Examine The Thermostat
If the thermostat is stuck or malfunctioning, it can prevent your car’s engine from reaching the optimal temperature for heating. Replacing a faulty thermostat is fairly straightforward but requires professional help if you’re unsure how to do it.
Step 5: Fix The Heater Controls
If your heater control valve or knobs are faulty, this could prevent you from adjusting the heat settings. This issue is often related to wiring or mechanical problems with the control system. A technician can diagnose and repair this for you.
Contact Us
Trust Bromley Vehicle Test Centre For Car Heater Repairing And Fixing
If you’ve tried troubleshooting your car heater not working and the issue persists, it’s time to call the experts at Bromley Vehicle Test Centre. Our experienced mechanics are well-versed in diagnosing and repairing a wide range of car heating system problems, from low coolant to faulty thermostats or clogged heater cores. We’ll ensure your heater is fixed quickly, efficiently, and at a competitive price.
If your heater is not blowing hot air, don’t hesitate to book a car heater repair with us. We are committed to providing high-quality car services and running your car smoothly.
Book a professional inspection with Bromley Vehicle Test Centre today.
Conclusion
So, when a car heater is not working, it can be frustrating, but many issues can be resolved with a little understanding and the right approach. Whether it’s topping up your coolant, fixing a clogged heater core, or replacing a faulty thermostat, taking action early can save you time and money. However, if you’re unsure or the issue persists, it’s always a good idea to seek professional help.
For expert car heater troubleshooting and car heater repair, trust Bromley Vehicle Test Centre. Contact us today to ensure your car is ready for the colder months ahead. Call us on 020 8460 6666 or email us at for fast and reliable service.
