Author Topic: radiator fan resistor (Read 8414 times)

jtanguay · « **on:** June 02, 2006, 04:12:07 pm »

I can't find this part ANYWHERE! all I can find is a 'blower motor' resistor. On most websites, it shows two motors. One a heater blower, and a blower. I don't think there are two blowers, but merely just different routing/ducting for heat, or a/c.

I'm currently running without it, and nothing seems to be going wrong... yet. I did buy a blower motor resistor, but it has 4 wire hookups on it, and the previous was just a one wire resistor.

Hopefully someone has had to deal with this problem before!

andy2 · « **Reply #1 on:** June 02, 2006, 07:17:45 pm »

Pretty sure its a stealer only part as I have replaced mine after loosing the low fan speed as well.I wonder if the you can simply bypass the resistor to get full speed fan on the low temp cycle.I think I made some sense there :lol:.

QuickTD · « **Reply #2 on:** June 02, 2006, 07:26:36 pm »

Quote

I wonder if the you can simply bypass the resistor to get full speed fan on the low temp cycle.

You certainly could, just connect a suitably heavy wire jumper (at least 14 guage wire) across the resistor terminals and you should be good to go.

LeeG · « **Reply #3 on:** June 02, 2006, 08:47:16 pm »

radiator or heater fan?

Sounds ike we'r talking heater fan resistor. Do any of those have only one wire? To me that would imply that the resistors were elsewhere like in the switch?

My '91 Jetta has a 4 wire resistor pack that looks like:
http://images1.drivewire.com/live/R203226416AFT.JPG

I replaced it when I lost all but high speed. $32Can from the aftermarket parts place. Maybe I should have paid stealer prices, I'm back to only high speed again after 2 years and 175,000 km

jtanguay · « **Reply #4 on:** June 02, 2006, 10:48:38 pm »

thanks for the input guys! I jumpered it, but all that I'm wondering is how long before the fan dies from running for extended periods? :?

QuickTD · « **Reply #5 on:** June 03, 2006, 05:57:34 am »

The fan shouldn't run any longer with the resistor jumpered, it'll just run faster.

You're not confusing the temperature switch with the resistor, are you?

jtanguay · « **Reply #6 on:** June 03, 2006, 06:01:51 am »

Well the fan will run continuously while the a/c is on. Thats what im worried about. If the fan should not run continuous while the a/c is on then i suppose my system has a faulty sensor, but the condenser does get quite hot.

Andy2 maybe I could come see your fan resistor and measure the ohms and buy one somewhere cheaper? How much does it cost at the stealer?

QuickTD · « **Reply #7 on:** June 03, 2006, 06:22:22 am »

Didn't realize you had functioning AC, that's somewhat rare in an A2...

You're right, it should run continuously on low speed while the ac is on. I'm sure someone here must have a used resistor. It won't be easy to find at an electronics store, its very high wattage (200+) and very low resistance >1ohm.

MacGyver · « **Reply #8 on:** June 03, 2006, 06:33:04 am »

I made one over 10yrs ago for my previous 87 Jetta.
I can't remember the values, but I calculated it out & bought two different values from Electrosonic that when added together almost matched OEM.
I seem to remember dealer wanting ~$40, and I got a bunch of other stuff from E at the same time, and was like half that including shipping

OEM is .82 or .86ohms I can't remember. Close is good enough for that, so long as it'll handle the watts. I think original was 20 or 40W but that could be on the edge & why they burn out :? It's about the size of my little finger.

QuickTD · « **Reply #9 on:** June 03, 2006, 06:45:55 am »

I made one for my lincoln diesel condenser fan. The current sampling shunts from servo motor amplifiers made an excellent fan resistor, low resistance and very high power. Not something everyone keeps though...

andy2 · « **Reply #10 on:** June 03, 2006, 05:35:11 pm »

My old jetta is off the road for good now

.I can't remember what the resistor is worth so how's $15 sound?Its about a year old from the stealer.

mtnman · « **Reply #11 on:** June 03, 2006, 10:21:00 pm »

I just bought an oem one from VM Autohaus in Vancouver part 171 959 493 cost$20.

jtanguay · « **Reply #12 on:** June 04, 2006, 10:33:49 am »

Ya I'm surprised the a/c still works too. I thought for sure I would need a new compressor at least. With R134a the system would probably die within a year or so since its so corrosive, but the hydrocarbon stuff isn't corrosive

I think that the compressor will last me about 2 years max, but the clutch might be on its way out soon. It engages nicely but I hear some high pitch churping that gets worse and worse, turn a/c off.. back on.. and its gone. I thought it might be the belt slipping though...

Darkness_is_spreading · « **Reply #13 on:** June 06, 2006, 10:38:28 am »

Just upgrade to a dual passat fan and run it too a switch, it works like a charm and you can switch it on when ever you want too

http://members.aol.com/scirocco87/pics/fans.jpg

jtanguay · « **Reply #14 on:** June 07, 2006, 12:24:56 am »

good call with the passat dual fans. I've seen some mk3 jettas with these types of fans. I wonder where to get good used ones? how much $$$ we talking here?

Author Topic: radiator fan resistor (Read 8414 times)

andy2

andy2