Thread Rating:
  • 4 Vote(s) - 3.25 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Heater fan fault
#1
Hi
Looking for a bit of advice on an intermitant heater fan fault..
Sometimes when the fan is switched on nothing happens until a bump is hit then fan springs into life...
Sounds like a loose connection...anyone know where to look?
Cheers
Reply
#2
Switch?Variable resistor?
Strawberry flavoured windows  Dodgy
Reply
#3
Look for a road with plenty of potholes, shound'nt be too hard too find!

:whistle::whistle::whistle:.

Seriously it might be the resistor pack or the brushes in the motor getting worn and sticking , the bump jolting them back into contact with the armature. try banging the motor when stopped with it switched on. A faulty switch even , it'll be a case of trying them all.

Confusedcratch:
Reply
#4
Hi there, had a similar problem for a few weeks. Sometimes the fan would work and others it would make a noise like it wanted to. In the end decided to take it out and have a look, it’s easy to get at just remove the lower passenger facia. The fan motor is held in with three screws. Once you’ve unplugged it and removed it will strip down to just the motor / fan. Just 2 screws hold the motor / fan in the housing. You can then see the carbon brushes. I found the brushes OK plenty of wear left in them and free movement. Motor looked good and would run with a 12v feed to the red and black wires coming directly out of the motor. I then turned my attention to the circuit in the motor housing, it has a couple of transistors on it and a relay. Found the relay contacts were dirty also the solder joints on one of the transistors looked a bit cracked. Cleaned relay contacts and gave the circuit board a good clean and re-soldered the joints I could get at and rebuilt it all. Up to now it’s been working fine. Also while I had the motor out I applied a small amount of oil to the bearings. Hope this is of help, I have explained it the best I can. Dave
Smile it's already happened! Big Grin
[-] The following 6 users say Thank You to trader97 for this post:
  • Ol'Jeffers, ron, scotty3968, SimonF, Walt, woody2day
Reply
#5
Adding the oil to bearings like that is something I have done for years,one of the better tips.
Strawberry flavoured windows  Dodgy
Reply
#6
Cheers for the replys gents much appreciated
And spot on Trader97
Reply


Forum Jump:


Users browsing this thread: 1 Guest(s)
[-]
Welcome
You have to register before you can post on our site.

Username:
  

Password:
  




[-]
Search
(Advanced Search)

[-]
Latest Threads
display fading (MFD B, not bulb related)
Last Post: sks01773
Today 07:50 PM
» Replies: 42
» Views: 6103
Are Mud Flaps the Answer ?
Last Post: iscom
Today 07:10 PM
» Replies: 4
» Views: 169
Head Light Bulbs
Last Post: dargoion
Today 05:52 PM
» Replies: 33
» Views: 988
radio code
Last Post: Tomcat3
Today 02:32 PM
» Replies: 3
» Views: 83
Sop the seatbelt buckle sitting soo low?/aux ste...
Last Post: Trevor
Today 02:13 PM
» Replies: 2
» Views: 43
Removing the rear roof storage bin (mk3 modutop)
Last Post: iscom
Today 01:31 PM
» Replies: 15
» Views: 6743
New Berlingo Auto Box - Anyone have one?
Last Post: doofer
Today 12:13 PM
» Replies: 4
» Views: 245
Help needed have immobiliser fault and fan probl...
Last Post: brajomobil
Today 12:07 PM
» Replies: 1
» Views: 63
Rear light bulb holders - keeps dropping bulb.
Last Post: Top drive
Today 12:01 PM
» Replies: 7
» Views: 297
What website to pass time over a winters evening...
Last Post: VanFanDan1984
Today 11:57 AM
» Replies: 1
» Views: 258

[-]
Recent Visitors
Locations of visitors to this page