2007 Volvo vnl 670 w/D16. Lost blower function in the cab. Diagnostics is showering stepper motor electrical fault on all 4 phase and a 5v supply electrical fault. When idling there is no air and when driving it blows gently. Any idea if it would be the switch or the blower?
No ac in cab, but works in sleeper
Discussion in 'Volvo Forum' started by 4wheelBoater, Jul 29, 2019.
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Run a set of jumper wires to the blower motor and see if it spins at full speed, if it does the switch is the problem.
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Takes about 45 mins to fix -
A new control module is around $400, that’s an expensive “test” if that isn’t it. Just thought maybe someone had had this happen before and would have a heads up
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Mine was doing the same thing, so I went for the low hangin' fruit and replaced the blower and module at the same time seein' as I had everything apart. Blower was 160 bucks I think and the module was 65. Works fine now.
KB3MMX Thanks this. -
Friggin easy to check tood281833 Thanks this.
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