W204 radiator fan on full, no aircon

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NDFR

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So I've had an interesting problem that may be of interest to someone in the future and I believe this problem could occur on any vehicle with a/c.

Started the car last Friday to have the radiator fan start up on full immediately and would not switch off, the car had been fine the day before. I thought 'strange' but got on with my day and noticed that the air-conditioning was also non existent. My mechanic took a look and STAR showed no faults on the vehicle.

A bit of of investigation with GOOGLE indicated that it may be a problem with the pressure sensor on the a/c condenser.

This article explains the problem exactly.

Engine Cooling Fan Running at Constant High Speed

This is the sensor in question

Genuine Mercedes-Benz Air Conditioning Condenser Pressure Sensor A2110000283 for sale online | eBay

It's a quick job to change but you do need to have the a/c gas removed first as removing the sensor allows the gas to escape and it's not good for the ozone layer apparently.

Luckily Groupon has an offer for a regas at ATS for £37.99 so in the end it didn't break the bank.

Hopefully if you suffer the same problem this post will help you on your way.
 
Interesting the Groupon price, I don't know about your part of the country but up here in the (just) North where I presume it must be cooler with less demand for aircon :p the going rate without a discount is £30-£35, the place I use allows me to go and have it emptied, go away and do what I need and then go back for a vacuum test and refill with lube and gas for £35, there is one place that advertises by the road a regas for £25 but I've never used them
 

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