Submariner1
Senior Member
- Joined
- Sep 3, 2016
- Messages
- 4,692
- Reaction score
- 788
- Location
- Windsor Berkshire
- Your Mercedes
- CL500 2009 5.5
I wondered how you can have different fan speeds left and right, when the air blower motor has twin impellers on the same shaft!
I took out the blower motor to clean it out, and expected to see twin impellers and twin motors.
Nope one motor, a single shaft protrudes either side, and an impeller on each end.
So how can it have fan speed 1 on the left and fan speed 4 on the right? There doesnt seem to be any other fans in the system. Just intrigued!
Worth cleaning out, as I found a fair few bits of dried leaves, a bit of dust and carbon brush dust and reassuringly no water stains .
Sometimes on start up I had a slight noise for a few seconds or until one speeded up the fan.
So I greased the surround of the shaft as it goes into each bearing.
Whether its the lithium bearing grease or the removal of the leave debris ... but now its silent
So worth doing.
I took out the blower motor to clean it out, and expected to see twin impellers and twin motors.
Nope one motor, a single shaft protrudes either side, and an impeller on each end.
So how can it have fan speed 1 on the left and fan speed 4 on the right? There doesnt seem to be any other fans in the system. Just intrigued!
Worth cleaning out, as I found a fair few bits of dried leaves, a bit of dust and carbon brush dust and reassuringly no water stains .
Sometimes on start up I had a slight noise for a few seconds or until one speeded up the fan.
So I greased the surround of the shaft as it goes into each bearing.
Whether its the lithium bearing grease or the removal of the leave debris ... but now its silent
So worth doing.