There is nothing worse than driving during winter, let alone your Range Rover’s heater not working, burrrr, but most importantly, it plays a pretty important role in your engine’s overall health!
The most common causes of a Range Rover heater not working are a faulty thermostat, a blocked heater core, a failed blend door actuator, a low coolant level, or a faulty water pump.
It’s more common than you’d think – I’ve had the pleasant experience of my Ranger Rover heater not working correctly during winter!
Read on to see the common causes and symptoms (other than coldness) and how to fix your Range Rover’s heater.
What models are affected?
- Land Rover Defender
- Range Rover Discovery
- Range Rover Evoque
- Range Rover Sport
- Range Rover Velar
- Range Rover Vogue
What causes your Range Rover heater to stop working
There are several common causes of a Range Rover heater not working properly. Some of the most common include:
1. Faulty Thermostat
The thermostat is responsible for regulating the temperature of the coolant flowing through the engine. If the thermostat becomes stuck in the closed position, it will prevent the coolant from flowing through the engine and into the heater core, which will prevent the heater from working.
2. Blocked Heater Core
The heater core is a small radiator that is responsible for heating the air that is blown into the cabin of the vehicle. If the heater core becomes blocked, it will prevent the coolant from flowing through it, which will prevent the heater from working.
3. Failed Blend Door Actuator
The blend door actuator is responsible for controlling the flow of hot and cold air into the cabin of the vehicle. If the actuator fails, it will prevent the hot air from flowing into the cabin, which will prevent the heater from working.
4. Low Coolant Level
If the coolant level in the engine is low, it will prevent the coolant from flowing through the engine and into the heater core, which will prevent the heater from working.
Read this: When should a Range Rover’s coolant be replaced?
5. Faulty Water Pump
The water pump is responsible for pumping the coolant through the engine. If the water pump fails, it will prevent the coolant from flowing through the engine and into the heater core, preventing the heater from working.
What you should look for to diagnose your Range Rover heater
If you are experiencing issues with your Range Rover heater not working, it is important to have it properly diagnosed by a professional mechanic.
They will be able to check the following:
1. Check if the thermostat is working
The mechanic will check the thermostat to ensure that it is opening and closing properly, which will help to determine if it is the cause of the problem.
2. Inspect the heater core for blockages
The mechanic will inspect the heater core to ensure that it is not blocked, which will help to determine if it is the cause of the problem.
3. Test the blend door actuator for proper function
The mechanic will test the blend door actuator to ensure that it is functioning properly, which will help to determine if it is the cause of the problem.
4. Check if the coolant level is at the correct level
The mechanic will check the coolant level and ensure that it is at the proper level, which will help to determine if it is the cause of the problem.
5. Inspect the water pump for leaks
The mechanic will inspect the water pump for leaks or other issues, which will help to determine if it is the cause of the problem.
Summary
The most common causes of the Range Rover heater not working include a faulty thermostat, a blocked heater core, a failed blend door actuator, a low coolant level, and a faulty water pump.
If you are experiencing issues with your heater, it is important to have it properly diagnosed by a professional.
FAQs
How can I tell if my thermostat is the cause of my heater not working?
A professional mechanic will be able to check the thermostat to ensure that it is opening and closing properly, which will help to determine if it is the cause of the problem.
Can a blocked heater core prevent my heater from working?
Yes, a blocked heater core can prevent the coolant from flowing through it, which will prevent the heater from working.
How do I know if my blend door actuator is the cause of my heater not working?
A professional mechanic will be able to test the blend door actuator to ensure that it is functioning properly, which will help to determine if it is the cause of the problem.
Can a low coolant level cause my heater to not work?
Yes, if the coolant level in the engine is low, it will prevent the coolant from flowing through the engine and into the heater core, which will prevent the heater from working.
How can I tell if my water pump is the cause of my heater not working?
A professional mechanic will be able to inspect the water pump for leaks or other issues, which will help to determine if it is the cause of the problem.
Do I need to go to a professional mechanic to diagnose my heater not working problem?
Yes, it is important to have your Range Rover heater properly diagnosed by a professional mechanic, as they will be able to check all the related parts and ensure that they are functioning properly.