MGZT radiator fan difference to rover 75 fan M47

[SD1too]

Originally Posted by janker

Hi yes i did and it looked in a fair condition to me.

OK Julian that's good. So on the demist test (with ignition on) the fan doesn't run? If you have a multimeter we could check whether the fault lies with the motor or the control box.

Simon

[janker]

Originally Posted by SD1too

OK Julian that's good. So on the demist test (with ignition on) the fan doesn't run? If you have a multimeter we could check whether the fault lies with the motor or the control box.

Simon

Hi Simon yes with ignition on doing the demist test nothing and yes i have a multimeter, what should i test thanks.

[SD1too]

Hi Julian,

The bad news is that you'll need access inside the control box.

Identify the large relay on the right hand side (this controls the low speed) and place your voltmeter on the terminal carrying the thick red wire. In demist mode do you see +12v there?

Simon

[janker]

Originally Posted by SD1too

Hi Julian,

The bad news is that you'll need access inside the control box.

Identify the large relay on the right hand side (this controls the low speed) and place your voltmeter on the terminal carrying the thick red wire. In demist mode do you see +12v there?

Simon

Thanks Simon will test it as soon as im not working after the weekend and let you know.

[janker]

Originally Posted by SD1too

Hi Julian,

The bad news is that you'll need access inside the control box.

Identify the large relay on the right hand side (this controls the low speed) and place your voltmeter on the terminal carrying the thick red wire. In demist mode do you see +12v there?

Simon

Hi Simon i had time today removed bumper etc and tested red wire in control box with car in demist mode yes i have 12v and also have a good earth so im guessing its definitely the fan that needs replacing.

[SD1too]

Originally Posted by janker

... so I'm guessing its definitely the fan that needs replacing.

Your control box is working properly on slow speed so the fault lies with the motor. You can check the connections to your new brushes to find out where the break in the circuit is. You were also considering fitting the motor from a V6 petrol. You won't be able to use its control box so some soldering will be necessary. Is this spare motor a 4 wire type like yours?

Simon

[janker]

As my Diesel has never got near overheating would the Aircon still work without slow speed fan working if i get it checked and regassed ??

cheers julian

[SD1too]

Originally Posted by janker

... would the Aircon still work without slow speed fan working if i get it checked and regassed ?

Hello Julian,

The air conditioning needs the slow fan speed. Without it, when the car's stationary or travelling slowly, you'll get little or no cooling. On really hot days, when you need the air con. the most, you may find that it doesn't cool satisfactorily at all. The trinary switch may well disengage the compressor if pressures rise too high. This will only irritate you in the long term and it's not good practice to operate a system knowing that it has a faulty component.

My advice is to get it fixed!

Simon

[janker]

Originally Posted by SD1too

Hello Julian,

The air conditioning needs the slow fan speed. Without it, when the car's stationary or travelling slowly, you'll get little or no cooling. On really hot days, when you need the air con. the most, you may find that it doesn't cool satisfactorily at all. The trinary switch may well disengage the compressor if pressures rise too high. This will only irritate you in the long term and it's not good practice to operate a system knowing that it has a faulty component.

My advice is to get it fixed!

Simon

Cheers Simon yes im going to get it sorted as i would like my aircon back appreciated your advice
cheers julain

[Arctic]

Hi Julian.
If you get stuck take an hours drive over to me drop both the fans off, leave them with me and i will take a look at them for you, maybe i can make a good one out of the two, FOC once i know i will let you know to pick them back up.