[snapper21]

My 2590 blower won't work in high. Is the switch burnt on that point or is the blower the problem? Where do you get at the blower. Have it in the shop to do some work on it and am wondering where I start tackling the problem.

 

[Grainline]

I would think the switch is the problem. If I Remember right u have to remove the panel on the outer roof to get at the blower. I would check the switch out first. Hope this helps

 

[snapper21]

Thank you. I'll try that first.

 

[farmshop]

I would also check switch. I assume low works. Most systems have resistors for the lower speeds and full voltage on high. Unless it has a dual fan set up

 

[snapper21]

Yeah low and med work

 

[lambear]

The blower is on the back outside of roof, easy to get at, it would be worthwhile taking off and cleaning, it's likly full of dirt as well.

 

[snapper21]

Got another switch but it doesn't have the resistors like on my tractor. Can I make it work? Or do I need to find the one with the resistors?

 

[V876]

Got another switch but it doesn't have the resistors like on my tractor. Can I make it work? Or do I need to find the one with the resistors?

I think it was depending on year wheather the resistor was located on the fan motor or the switch. The resistor is there to reduce power for low/med but I think high by passed it.
Take your cab filter out and you will see the blower motor.
Before changing switches check power output in all three positions at the back of the switch, if good check it at the fan.
If it is the switch you will need one with or will have to install an inline resistor so all blower speeds will function.

 

[tswanson]

I'm pretty sure there is a separate resistor between the switch and the fan motor. Think it's at the front of the cab roof. Follow the wiring.

 

[snapper21]

Fiddled with the old switch. Got high speed if I wiggled the one contact enough. So definitely the switch. Seems like that style of switch is hard for the case dealer to find. See internet is littered with them. I am no brain on this sort of stuff but is this switch with the resistors like a rheostat?

 

[tswanson]

Fiddled with the old switch. Got high speed if I wiggled the one contact enough. So definitely the switch. Seems like that style of switch is hard for the case dealer to find. See internet is littered with them. I am no brain on this sort of stuff but is this switch with the resistors like a rheostat?

Sort of. A rheostat varies the voltage from low to high gradually. A resistor has a predefined out put. A switch with low/med/high would have two resistor wires for the low/med, and none for the high. I know my 2290 has a separate resistor. I'm assuming your 2590 is older as the Case parts site show the lower serial numbers had the switch with the resistor on it. If your dealer has the separate resistor, it wouldn't be hard to wire it in with the new switch you have.

 

[V876]

Here is a link and part number for a jobber supplier for you switch with resistor. http://aacparts.ca/index.php5
Part # 12-105

 

[snapper21]

Here is a link and part number for a jobber supplier for you switch with resistor. Assiniboia Air Conditioning & Distribution Ltd.
Part # 12-105

Thanks I bookmarked the site. I was in toon town yesterday and got one for about double what that site quoted. Grr. That site looks reasonable on prices.

 

[litefoot]

Mine doesn't work either....can I just wire the hot to the high, or does it need a resistor also? I usually only need the high or none, so am not concerned with low, med. thanks

 

[V876]

Mine doesn't work either....can I just wire the hot to the high, or does it need a resistor also? I usually only need the high or none, so am not concerned with low, med. thanks

You could but you would still need a switch of some kind or it would run on high continuosuly. :sFun_doh2:
Might be better to check out the link posted earlier, the switch is pretty reasonable and easy to replace.

 

[tswanson]

Mine doesn't work either....can I just wire the hot to the high, or does it need a resistor also? I usually only need the high or none, so am not concerned with low, med. thanks

If all you want is high then you could replace it with a simple toggle switch but you need to also send power to the A/C thermostat as well as it gets it's power from the fan switch.

 

[litefoot]

thx, that was my plan actually, but i didn't know about the thermostat? I will make sure it gets pwr also. Thx again for the advice!