Mercedes-Benz CLK320 Problem Report

Mercedes-Benz CLK320 Poor AC performance Due to Evaporator Temperature Sensor Failure

(8 reports)

The evaporator temperature sensor can fail, causing the AC compressor not to cycle. If the AC compressor does not turn on, the AC system will not blow cold air. If the compressor is stuck on, the air will be very cold at first, before warming up.

climate control system not working, blows hot air and the trouble code reads b1421, not fixe yet as I can not find out what 1421 is. No problem though it was cool today only 105f -
ac runs well for a few minutes then comp. turns off, turn engine off for a few(10)seconds and comp gomes on and turns off again , aux recirculation pump is bad could that be the cause ? -
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