Air con failures found to be servicing issue in 99 per cent of cases, DENSO say

Service neglect and failure to refilling refrigerant are a number one cause of failure

Air con failures found to be servicing issue in 99 per cent of cases, DENSO say
DENSO say a properly maintained and well-serviced air conditioning system will help provide a longer lifetime for parts, with fewer or no expensive repairs required.

Extreme levels of demand and usage makes air conditioning a source of satisfaction and frustration in equal measure.

In a press release, DENSO said: “Air-conditioning systems need regular maintenance to ensure good performance throughout the year, particularly during the spring and summer when the parts are put under a greater strain.

“In just 45-60 minutes, workshops can deliver a thorough air-conditioning service.”

Providing an efficient, comprehensive air-con service

1. To confirm the current operation and performance of the air conditioning system, it is essential to find out whether customers have noticed any issues with their car; whether a noticeable decrease in performance, noises or bad interior odours. Check the air conditioning cooling performance by measuring the air outlet temperature in order to have a precise reference value when performing the final check later.

2. Check if the vehicle is equipped with an interior filter and if this filter needs replacing. Timely replacement will prevent reduction of airflow into the car’s interior and in some cases, blockages.

3. Check if there is any damage, such as stone hitting or corrosion, which might give problems later and check whether the condenser or radiator surface is polluted with dirt, which can restrict air flow.

4. Identification of the refrigerant inside the system. ‘Drop in’ or imitation refrigerants can easily reduce performance and damage the system components, such as the compressor.

5. Identification of the quality of the refrigerant and oil. Many times improper oils are used and improper or too much UV leak detection fluid is used, which can reduce lifetime of the compressor and is one of the main reasons why compressors fail.

6. Check for refrigerant leakage. There is no one perfect method for identifying leaks and best practice is the combination of two or three different methods.

7. Test air-conditioning system for proper operation. When checking the system operation, you not only test performance, but also check for noise, operation of condenser fan and air flow, air mixing and, bad smell in the interior when in air conditioning mode.

DENSO added: “Delivering lower fuel consumption, exhaust emissions and noise, a comprehensive service can help improve workshop’s customer service and secure return business.”

For more information about DENSO’s range of aftermarket products see ‘more details’ below.

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