My heater fan quit working, is there anything simple to check or should I assume it's the fan itself? When the heater is turned on I can hear the vents opening anf closing but no fan.
Thanks
94 E320 Heater
Dec 30, 2003
2 Replies
There are no resistors for speed on 124.032 chassis. The speed is controlled on these via the Control panel sending a variable voltage signal [ 3v. to 7v.] to a transistorized voltage regulator/heat sink with a switched ground next to the blower motor. The test is for voltage at the 3 prong plug behind the brake booster. The yellow is trigger volts and the others are load power. I would check the main feed fuse /circuit first.
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