Heater Blower fan resistor

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patrover
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Heater Blower fan resistor

Post by patrover » Mon Apr 24, 2017 12:45 pm

Hi
Im looking for a Denso fan resistor 077200-3840 as mine has failed, please get in touch if you have one to sell or can point me in the direction of one.
Rimmers nil stock & unable to supply and none on eBay at moment,

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rovercoup
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Re: Heater Blower fan resistor

Post by rovercoup » Mon Apr 24, 2017 4:54 pm

Mogtypus was selling one on ebay recently and did not sell so presumably will still have it awaiting relist at some point. Maybe worth a cold call email via ebay.
Rover 827 Vitesse Fastback Man Mk1 89
Rover 827 Sterling saloon Auto 90
Rover 820 Fastback 2.0 MPi Auto 90
Rover 820 Coupe sport 94
Rover 827 Sterling Saloon 95 auto
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scoobyh123
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Re: Heater Blower fan resistor

Post by scoobyh123 » Wed Apr 26, 2017 3:34 pm

Is it for a Mk1 or Mk2, air-con or non air-con?

I might have a working one in my shed attached to a rather dead fan unit.
Cheers,
Dave

'02 Honda CR-V SE Executive
'99 Jag S Type 3.0 V6 SE


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Re: Heater Blower fan resistor

Post by patrover » Mon May 01, 2017 7:09 am

Hi
Thanks for the advice, got one from eBay, fitted and still no go!!!,
I was convinced that was the problem,
Back to 820 Heater fan pages from czar12 and others on the forum, some great reading and advice.

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traineefarmer
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Re: Heater Blower fan resistor

Post by traineefarmer » Mon May 01, 2017 7:33 am

Have you checked the bi-metal overload switch?
Tom.

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scoobyh123
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Re: Heater Blower fan resistor

Post by scoobyh123 » Mon May 01, 2017 9:32 am

The fan motor itself might be dead, have you tried feeding the motor directly?
Cheers,
Dave

'02 Honda CR-V SE Executive
'99 Jag S Type 3.0 V6 SE


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'94 827 Sterling saloon
'88 Volvo 760 V6 Estate
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Re: Heater Blower fan resistor

Post by zcar12 » Mon May 01, 2017 9:40 am

Tom, glad to hear that my posts on the 820 heater fan were useful to you. From memory, the two wire wound resistances were good so I bypassed the beryllium metal bit on the fan plate with a 121c temperature resistant fuse. That is to say, if the temperature rises above 121c, the fuse will blow. I now think that 121c is a bit too high so a 100c fuse should work just as well and not blow.

It was very useful to have all the fan speeds working last winter.

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traineefarmer
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Re: Heater Blower fan resistor

Post by traineefarmer » Mon May 01, 2017 9:22 pm

zcar12 wrote:Tom, glad to hear that my posts on the 820 heater fan were useful to you. From memory, the two wire wound resistances were good so I bypassed the beryllium metal bit on the fan plate with a 121c temperature resistant fuse. That is to say, if the temperature rises above 121c, the fuse will blow. I now think that 121c is a bit too high so a 100c fuse should work just as well and not blow.

It was very useful to have all the fan speeds working last winter.
I had one fail from corrosion on my first 800 16 years ago. My solution was a bit less refined than yours though. A short length of copper wire got soldered over the top!

Saw out my ownership of the car....
Tom.

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'03 XC90 D5

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scoobyh123
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Re: Heater Blower fan resistor

Post by scoobyh123 » Mon May 01, 2017 10:33 pm

Hooligan! :lol:
Cheers,
Dave

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'99 Jag S Type 3.0 V6 SE


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'94 827 Sterling saloon
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Re: Heater Blower fan resistor

Post by patrover » Tue May 02, 2017 9:09 pm

Bi metal fuse, replaced, fan will run on high speed when resistor linked out, and when removed from car.
Might try a lighted match under the dash!!!

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scoobyh123
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Re: Heater Blower fan resistor

Post by scoobyh123 » Tue May 02, 2017 10:34 pm

That points to the switch then for the intermediate speeds.
Cheers,
Dave

'02 Honda CR-V SE Executive
'99 Jag S Type 3.0 V6 SE


Image
'94 827 Sterling saloon
'88 Volvo 760 V6 Estate
'95 827 Coupé LPG gone but not forgotten!

patrover
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Re: Heater Blower fan resistor

Post by patrover » Wed May 31, 2017 5:42 pm

Hi all
Thanks for all for your advice in sorting this problem out, it was an earth fault, ( by wiper motor) collected a few spares so will be ready to fix quickly next time.
Looking forward to laying on my back with my fingers in places they shouldn't go :roll: :roll:
Pat.

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scoobyh123
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Re: Heater Blower fan resistor

Post by scoobyh123 » Wed May 31, 2017 9:47 pm

Ooo-errr missus! :shock: :lol:

Glad you got it sorted Pat! :wink: :D
Cheers,
Dave

'02 Honda CR-V SE Executive
'99 Jag S Type 3.0 V6 SE


Image
'94 827 Sterling saloon
'88 Volvo 760 V6 Estate
'95 827 Coupé LPG gone but not forgotten!

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