Wanted: Heater Resistor/Transistor

Frequently asked technical questions and common modifications/improvements
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Ian_Fearn
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Wanted: Heater Resistor/Transistor

Post by Ian_Fearn » Sat Jan 16, 2010 5:34 pm

Does anybody have a BX heater resistor (or is it a transistor?) going spare? The one that screws into the back of the blower.

I've confirmed its broken on my BX and i'm soooo cold. Although GSF still list them, they no longer have any left.

Good money waiting :D
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ken newbold
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Post by ken newbold » Sat Jan 16, 2010 8:12 pm

If it's not blowing at all, take it out and re-solder all the connections of the PCB and clean up both side of the metal disc that's in there, I think you'll find that cures it.

I've found that only when they fail and you've got full blow are they knacked.
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Stinkwheel
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Post by Stinkwheel » Sat Jan 16, 2010 10:56 pm

Does anyone have the number off the heater resisitor things? I work in electronics/electrics.

Good chance ive got some at work.
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Post by mat_fenwick » Sun Jan 17, 2010 12:04 am

It's a PNP transistor in a TO3 case - I replaced mine with a heavier duty version from RS but I'm buggered if I can find the details at the moment. I cross referenced it from the part no. of an original transistor and replaced it with the highest current rating one I could find since I am running twin fans.
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Post by BX Bandit » Sun Jan 17, 2010 9:59 am

Stinkwheel wrote:Does anyone have the number off the heater resisitor things? I work in electronics/electrics.

Good chance ive got some at work.
Stinky you took the words right out of mouth, it must been while I wa......... :oops: no, wait....

Start again.

I have what Ian wants but I think it's a dud anyway, but it's easy to hand so I'll try and read the transistor part number.
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Post by Ian_Fearn » Sun Jan 17, 2010 10:24 am

Many thanks for the responses, i've been offered one now. He's going to check it works today for me.

Very interested to know what this aftermarket type resistor mod is? Could turn into more of a problem in a few years when theres no spares left.
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Brian
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Post by Brian » Sun Jan 17, 2010 5:58 pm

Replacement Regulator transistor:

2N5879/80
2N6029/30/31
2N6246
2SA1116
BD318
MUJ15016
All P Type TO3 case 15 Amps

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Stinkwheel
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Post by Stinkwheel » Mon Jan 18, 2010 9:07 am

Ah, thanks for the compativle list Brian, saves me bothering to look :)

As it turns out do have a couple of the BD318 marked ones hereon the shelf
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93 BX TZD Estate
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93 BX 19 TXD Estate
92 BX 16TXi
77 Ami 8 Break
79 Acadiane
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To slightly mis-quote Kitch ... "BX 14. They're just brilliant!"

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Vanny
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Post by Vanny » Mon Jan 18, 2010 7:39 pm

Worthy of going in the technical archive this usefull snippet me thinks!

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mat_fenwick
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Post by mat_fenwick » Mon Jan 18, 2010 11:51 pm

Agreed. Have moved it now! (People should still be able to post in this section, although not start new topics - please let me know if this is not the case).

To add to Brian's list is the part number FW26925A1.
For further information I replaced mine with this, which has a part number of MJ11015 and can take 30A. Apparently the standard transistor is also used on A/C cars with twin fans, so overkill really.
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Post by kermit the frog » Tue Jan 19, 2010 1:56 pm

I have to wholeheartedly agree with VANNY.

This is a definite resource which needs to be expanded so if any component parts are available for whatever is on a BX we need to try our best to list them here for future reference.

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