Repair of the heating system

The presence of even one of these signs means you should immediately bring the vehicle to a service station for a major heater-system repair. But there are problems that even an experienced driver will not see, hear, or feel, so this mechanism should be diagnosed at a service station at least once a year.

Our technicians, using modern equipment, will identify all the above causes and promptly repair the mechanism or replace parts. We work only with leading manufacturers and can order the heating-system parts you need even before you arrive.

What is the heating system and how it works

Heating system – a mechanism that keeps the interior of a vehicle comfortably warm.

Components

• radiator
• hoses for coolant circulation (inlet and outlet)
• flow regulator
• air duct
• air flap
• fan

Why the cabin heater does not work

1. Insufficient antifreeze

The cause may be a shortage of antifreeze or air locks. When you refill with new coolant, small leaks can let air into the heater. In this case the coolant must be topped up to the required level so the air can escape completely.

2. Thermostat

If you set the heater to maximum but the cabin does not warm up, the thermostat may be stuck open. This can also affect engine operation, causing it to overheat and the car to stall on the road.

3. Too much debris has accumulated in the radiator

In this case you may notice an unpleasant smell in the cabin. To prevent foreign objects, dust or insects from entering the radiator, we recommend cleaning it both inside and outside.

4. Hoses

If poor-quality antifreeze is in the hoses, deposits form and can block the passages

5. The fan works poorly

The most common reasons are burnt-out contacts or worn brushes and bearings. You can first check the electrical circuit, but most likely the entire fan motor will need replacing.

6. Breakdowns in the heater valve

Possible causes are a seized lever, the valve reaching the end of its service life, or dried-out seals. The correct solution is to replace the heater valve and radiator.

One fault in a car triggers a chain of others. The main problems in the heating system are a clogged radiator or a failed water pump. This can overheat the engine and the car may not start at all, which leads to expensive engine repairs. Do not ignore obvious heater faults.

We order all parts only from leading manufacturers, so if replacement is needed you can call us and we will arrange it in advance. If the fault is more serious, our technicians will replace the heater motor or other heating components.

Imagine: it’s freezing outside, you step out of the car for coffee, your nose and cheeks go red, your hands freeze. Then you get back into the car and feel the warm cabin. Nice, isn’t it? To keep everything running smoothly—no unpleasant smells and no situations where the heater seems to be on full blast but the cabin is still cold—come to us.

The technicians at the MB Master network are always ready to look after your car, repair everything, and do their utmost to make your trip comfortable.