Yes, I think that the resistor pack controls 1,2 and 3. Speed 4 wouldn't require a resistor as it can run flat out.

Have a read of this. http://forums.mg-rover.org/showthread.php?t=55979

and for a new/replacement resistor pack, pm Technozen. http://forums.mg-rover.org/private.php?do=newpm&u=181

Hope that helps,
Ian.

 

Thanks Ian! Excellent service from MG-Rover.org as per usual

 

All in a days work.

 

I have had this same resistor pack for my MK1 ZR when speeds 1 and 2 were not working. Technozen is an absolute star, shipped me 2 sets of the resistors with full instructions, which arrived the day after i paid him for them. He is certainly the man to speak to on the matter!

 

This has happened so many times to my car.

Best bet is to use 3 - 4 for heating and 1 - 2 for cooling.

 

Best bet is to use 3 - 4 for heating and 1 - 2 for cooling.

It doesn't really matter what speeds you use for heating or cooling, all put stress on the resistor pack, especially speeds 2 and 3, speed 4 bypasses the pack.
Add to the equation a poorly designed original part which will inevitably fail, even the new OE resistor packs have the same underrated components.


Unfortunately I no longer supply the repair kits, however the following 7 watt resistors from Maplin and other component suppliers can be used to make a much more reliable repair...

Use two of each value in series to make each resistor.

0.1 ohm order code L0.1
0.22 ohm order code L0.22
0.68 ohm order code L0.68

 

technozen, seeing as your savvy in these departments, are the 200 bubble era packs better built than the new 25/ZR versions? I've got through 2 packs from a 25 and both failed, I salvaged a 200 pack and it's been perfect since. *touch of wood*

 

Unfortunately, no.

The same value resistor coils are used on the packs fitted to the 200/400/MGF/25/45/ZR/ZS and Freelander.

I have checked the latest part and the coils do not differ other than the fact that they have more ceramic "goo" on the coils for physical support.

 

To anyone that intends to replace the weedy coil packs - just take a look behind the glove box and look at the OE item, you will realise why it is so prone to failure! It actually looks like it would be more at home in a 60's wireless!

 

Mine failed, replaced with a new set, £25...I'm crap at soldering

Si

 

There is someone on ebay who sells ones with the ceramic resistors for about £15

 

If they had used a higher gauge wire for the coils we would have never seen any failures, maybe the idea was to design in a finite lifespan - who knows??

 

There is someone on ebay who sells ones with the ceramic resistors for about £15

Yeah, mine went over 12 months ago and the only ones going at that time where £25 posted...never mind at least my heater all works nice

Si

 

Well the only good thing is it's easily reachable and a 5 minute job to replace.

 

Wasn't aimed at you Si, sorry if it came across as a bit of a dig.

It was just a general hint as to where to get an uprated one if you don't want to diy it yourself.

 

Wasn't aimed at you Si, sorry if it came across as a bit of a dig.

It was just a general hint as to where to get an uprated one if you don't want to diy it yourself.

No worries Stu

Just saying that at £15, that's a good deal...like I said mine went over 12 months ago, was going to do the fix, but I am crap at soldering so only option was to buy new...thing is it was £25 posted for me

Si

 

Hi guys,

Can somebody confirm that this is the part that I need?

http://www.tiny.cc/pPcZH

Thanks
Martyn

 

Yes, that's the correct part.

 

Mmmmm, this one isn't an official part but claims to be just as good, if not better:

http://tinyurl.com/lvbczm

Its a lot cheaper. What do you reckon?

 

I "checked" this product when I was selling resistor kits, lower gauge wire than the originals and the resistance values are also wrong! The same follows for their ceramic resistors too.

As mentined in my earlier post you can purchase the correct value resistors from Maplin for less than £3, I can email you my repair guide if you are unsure about the correct fitment etc.

 

Just to add to this.. I openly admit i am a bit cack-handed with soldering, and it took me about 30 mins to take the item out and replace the coil packs with resistors. This also included remembering how i was taught to solder at school! It really is a simple job and is much better than buying an expensive OE part that will only fail again..

Just my $0.02!

 

Sounds good to me!

Could you e-mail me your guide technozen?

Thanks
Martyn

 

Use two of each value in series

can you just confirm for me thats in series not parallel, cheers

ok just read the long thread...well some of it...is there a wiring diagram anywhere?

 

Two of each resistor in series, for example the two 0.1 ohm resistors will make a 0.2 ohm resistor.

 

What would happen if I just soldered the broken wire? Mine failed this morning. It is identical to the Honda part found in the 5 door Civic of the same era as the 400.

 

replaced mine about a month ago, got a complete resistor pack off of e-bay, original part for £9.99 including free delivery, and about 5-10 mins to put in. Now works fine , by the way only speed 3&4 was working now all good, lovely and quiet inside the cabin when on speed 1

 

i recently bought a spare one,even though the one i have is working perfectly,just means if it does fail i have another to fit instantly,and dont have to wait days for a new one getting delivered...simples ...lol