Mercedes SLK Heater Fault
In your Mercedes, the climate control is fantastic on hot days. When you need cool air, it provides it to you, leaving you relaxed and comfortable. But what if cold air was constantly pumping out, no matter how cold it was?
This is what a recent customer experienced in their Mercedes SLK. No matter how hard they tried, they couldn’t get the heater to blow warm air!
It is for this reason that they contacted our team at Shires Garage. With our expertise and tools, we were able to diagnose the cool air issue quickly so they could stay warm this winter.
Resolving the Heater Issue
We immediately took the customer’s SLK into the workshop, where our dedicated team began diagnosing the issue. Our experts found the problem immediately by looking in all the right places.
Despite selecting the hot air setting, the climate control system pumped out cold air. It remained the same even when the engine was warm – something wasn’t right.
Vehicle heaters use a heater matrix to warm up the air that blows through vents to warm up the interior cabin. During the winter, this keeps you warm and demists the windows simultaneously.Several parts make up the heater box, and any one of them could be the reason for the malfunction.
We perform an extensive test procedure with every customer vehicle to ensure that the issue is resolved as quickly as possible, as was the case with this customer’s SLK.
Our diagnostic procedure does not leave anything to chance; we perform tests such as:
- Check the heater’s functionality
- Checking diagnostic fault codes
- Visual inspection
- Checking the electrical circuits
- HVAC checks, including internal heating matrix and box.
We performed all these tests to determine why our client’s heater only pumped cool air.
When you bring your vehicle to Shires Garage, we will thoroughly check the climate control and heater systems so that any faults may be identified. We did not want to replace the entire heater system if it wasn’t necessary. Ultimately, it may not have resolved the issue and would have wasted the client’s time and money.
In this client’s Mercedes, our experts suspected an issue with the heater box shaft, so they needed to ensure there were no other problems.
Cool Air Issue Diagnosis
Our fault-finding process at Shires Garage involves 15 steps, and we have a team of experts on hand in case they find a fault or need to perform a repair. This allows us to detect even the smallest issues that other garages would miss.
Nobody wants to regularly frequent garages or pile up expensive repair bills, do they?
After a thorough inspection of the entire system, our technician discovered one major problem.
Repairing the Heater on the Mercedes SLK
Our Mercedes experts quickly noticed a problem: the heater box had a faulty shaft, causing the heater to remain in the cold setting permanently.
Using advanced equipment and the right knowledge, our technician discovered that the heater motor was not moving or providing warm air.
A closer inspection of the shaft was required to determine whether the issue could be resolved by removing the heater box. In order for the Mercedes heater box to work correctly, all components must be in sync. This unit is manufactured in a way that makes the shaft impossible to repair alone.
In order to resolve the issue of cold air, our technician recommended replacing the heater box.
We immediately contacted our client after sourcing a quote for the part and repair process.
In this case, the customer was glad we found the root cause of the cold air issue and gave us the go-ahead to replace the heater box.
At Shires Garage, customer involvement and control are maintained throughout the process, so we only proceed once they approve the suggested work.
We only use genuine Mercedes parts or high-quality alternatives for every repair at Shires Garage. By doing this, we ensure that the condition of your vehicle remains excellent. By using high-quality parts, your vehicle will perform better, last longer, and be more efficient.
In order to determine the root cause of the problem, our technician removed the old faulty heater box. It involved removing the interior components and dashboard and getting to the heating system’s inner workings. This procedure then enabled the installation of the new box.
After the new genuine part was installed, the dashboard and interior components were put back exactly as they were before. After that, our technician conducted an in-depth test.
The vehicle was driven for a few minutes to warm up the engine. It didn’t take long for the engine to warm up enough to test the new heater box. To determine if the problem had been resolved, our technician turned on the heater and slowly increased the temperature.
Replacement of the heater box was precisely what was needed. The hot air warmed up the cabin, which will help our client to stay toasty and warm – just what they needed in the freezing winter weather.
There was no longer bitter cold air blasting from the heater system. It was instead a fully functional heater unit with temperature control and full adjustment, as it should be.
Upon discovering they could be warm and comfortable again while driving, our client was over the moon.
Summary
There was a problem with the heater in our client’s Mercedes SLK. Despite setting the thermostat to a warm temperature, the system could only disperse cool air.
Our expert technicians at Shires Garage diagnosed and repaired the problem in no time at all.
Due to our extensive experience with Mercedes vehicles, we knew what action to take to resolve the problem.
Testing revealed that the heater box’s internal shaft was not functioning properly, and the whole box needed to be replaced.
Following a clear explanation of the diagnosis and repair recommendation with our client, we began the repair. By using a genuine Mercedes heater box replacement, we were able to fix the issue the same day, saving our client precious time.
Upon completion of the repair, the heater box was tested to ensure it produced hot air once again, and it now worked perfectly!
We can solve any issues with your Mercedes’ heating system at Shires Garage. Contact our team today!
