110 CSW Heater

Nov 13, 2005 4 Replies
S

Perhaps someone could help me out, with winter coming on I have realised that my heater blower is U/S (110 CSW). I have traced the cables out and I am a bit confused over the purpose of the resistor in the top of the unit. I have 12v going into the motor unit and I can detect a closed circuit across the two cables going into the motor. I then have a cable from the motor and two others that go into this resistor. I seem to be getting a short from somewhere which occasionaly blows the fan fuse. I suppose my questions are as follows:


  1. What is the resistor for and could it be the cause of my problems
  2. Can anyone shed any light on what could be the problem before I have to commit to removing the heater assembly completely
  3. Anybody have a rough idea on the cost of a new blower motor if mine is dead

Thanks in advance



Smudge



Vote
Twitter Facebook LinkedIn
A

On or around 13 Nov 2005 10:32:57 -0800, "Smudge" enlightened us thusly:

resistor is for speed control - you have a 2-speed blower, ISTR...

try bypassing it and see if the motor spins. But if it's nogo in all speed positions, 's more likely to be the motor.

Vote
Twitter Facebook LinkedIn
B

It's also worth taking the grille off the wing and haveing a grope around in the duct - it's not unknown for the dump valave to get blocked leaving the motor immersed in water.

RTC4200 Heater Blower Motor - RHD - Defender to LA939975 £64.92 UTP1911 Heater Blower Motor - RHD - Defender from MA939976 £64.62 both inc VAT

Richard

Vote
Twitter Facebook LinkedIn
S

Thanks for the responses, I'll have a rummage down the duct at the weekend...!

Smudge

Vote
Twitter Facebook LinkedIn
R

I spent a happy time sorting what sounds like a similar problem - constantly blowing fuses - turned out that the blower is known to build up esistance - the fix was a new motor!

Reasonably easy job iirc.

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required