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sprinkles08, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 21435
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Auxiliary fans are not running at full speed or enough and

Customer Question

auxiliary fans are not running at full speed or long enough and a/c stops working. it has new pressure sensor and the system is appropriately charged with Freon.
Submitted: 2 months ago.
Category: Mercedes
Expert:  sprinkles08 replied 1 month ago.

Hello and welcome to JustAnswer!

If the cooling fans are turning off and a/c high side pressure is climbing until vent temp warms up it could be a fan control issue, a fan motor failure, or it may not be seeing a correct high side pressure reading. If it doesn't know pressure is high then it can't run the fans.

Has any actual testing been done?

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