Blower Resistor Repair

erhan · Jan 5th, 2020, 08:13

My car is 2001 S40 2.0 T4. Heater fan was not working properly.The blower was accelerating on its own. I think the problem was the blower resistance. There is a transistor inside the blower resistor. Transistor is MJ802. I ordered the transistor from China. New transistor I installed the new transistor. Problem solved. Blower now works fine. There's a picture here

bimmer49 · Jan 5th, 2020, 20:34

erhan my blower works fine on position 5 but if you put on 1,2,3 or 4 the fan speeds up and slows down on its own. Is this what was happening to your car?

CharlesStevenson · Jan 6th, 2020, 11:16

There's a post in the 'articles' sub-forum about this too ...

https://www.volvoforums.org.uk/showthread.php?t=151801

If you're finding your fan speed goes up & down on its own then it might not be the resistor but something inside the heater control unit, so you might want to have a look through some of the previous posts on here to see if they can shed any more light on this for you.

erhan · Jan 8th, 2020, 22:43

Quote:

Originally Posted by bimmer49

erhan my blower works fine on position 5 but if you put on 1,2,3 or 4 the fan speeds up and slows down on its own. Is this what was happening to your car?

Yes. My problem is the same as yours. My blower was working erratically. But now working good. You are try its. 30864189 OEM no: Blower Resistor. Buy a new blower resistor or repair it. I tried my luck and I did it. I bought a transistor and assembled it. Good luck bro

SAVOLVOMARK · Jan 16th, 2020, 16:49

please advise where i can purchase a new heater fan resistor as i also have the fan speed problem on speeds 1 - 3

magnuz · Jan 16th, 2020, 17:22

You should be able to get the MJ802 power transistor from any electronics shop, or ebay https://www.ebay.co.uk/sch/i.html?_f...mj802&_sacat=0

Jan 5th, 2020, 08:13	#1
erhan New Member Last Online: Jan 8th, 2020 22:51 Join Date: Nov 2019 Location: bursa	Blower Resistor Repair My car is 2001 S40 2.0 T4. Heater fan was not working properly.The blower was accelerating on its own. I think the problem was the blower resistance. There is a transistor inside the blower resistor. Transistor is MJ802. I ordered the transistor from China. New transistor I installed the new transistor. Problem solved. Blower now works fine. There's a picture here

Jan 5th, 2020, 20:34	#2
bimmer49 Always listen & learn! Last Online: Mar 13th, 2023 19:32 Join Date: Dec 2013 Location: Winchester + Malaga	erhan my blower works fine on position 5 but if you put on 1,2,3 or 4 the fan speeds up and slows down on its own. Is this what was happening to your car? __________________ 264 V8 5.0L V40 BiFuel, she's gone, she's dead......Oh well!

Jan 6th, 2020, 11:16	#3
CharlesStevenson Premier Member Last Online: Mar 24th, 2024 17:33 Join Date: Nov 2000 Location: Nottingham	There's a post in the 'articles' sub-forum about this too ... https://www.volvoforums.org.uk/showthread.php?t=151801 If you're finding your fan speed goes up & down on its own then it might not be the resistor but something inside the heater control unit, so you might want to have a look through some of the previous posts on here to see if they can shed any more light on this for you. __________________ Now: 04 reg V70 2.4 SE 2.4 auto 177k Then: Volvo, Saab, BMW, MB, Ford, Vx, Opel, Fiat, Rover, Porsche, Alfa, Austin, Renault, etc

Jan 16th, 2020, 16:49	#5
SAVOLVOMARK New Member Last Online: Jan 20th, 2020 18:16 Join Date: Jan 2020 Location: Johannesburg	fan resistor please advise where i can purchase a new heater fan resistor as i also have the fan speed problem on speeds 1 - 3

Jan 16th, 2020, 17:22	#6
magnuz Ancient Last Online: Yesterday 20:31 Join Date: May 2012 Location: chesterfield	You should be able to get the MJ802 power transistor from any electronics shop, or ebay https://www.ebay.co.uk/sch/i.html?_f...mj802&_sacat=0

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