T-rexnut

Hello fellow rotarheads:

I do need a little help. Somewhere on this forum I saw a reference to a thread on how to increase the heater blower fan speed by jumping connections on the blower assembly.

I have searched and searched and could not relocate that thread. Could someone please direct me to that thread or put a link to it?

I have no air conditioner and I want to increase the blower speed on my 1984-It gets f--in cooooold up here even if I am a lucky enough SOB to be able to run my REX up and down a sports car driver's dream.

Remember that commercial where the husband buys a house on a hill that he just drove up after he looks back down the switch backs?

Thanks in advance

Rotaries Forever

KehoeAutomotive

I can't imagine how a jumper wire would increase your blower speed over the regular high setting.

Usually when you put a blower on a lower speed it sends the voltage to the motor througha blower resistor thereby slowing the motor down.

Usually on high it just gets direct voltage from the relay.

You could try to hook up a direct 12volts to the blower with a fresh ground and see if it spins any faster but i doubt it.

If it does spin faster then I would say that there is a problem with your wiring (probably ground).

Does it seem to spin slow in every speed?

bliffle

The fan gets slower and slower as it wears out, then it finally stops. Go to the junkyard. You can probably adapt an escort fan, if necessary.

Once I had a fan connection burnout in the fusebox. But you don't have to replace the entire fusebox (a b*tch), just the burned out copper blades.

B

Lotus00

I dont know if this applies to all years, but once my fan got stuck (the thing was off-balance) and there is a fuseable link in the fan assambly. i assume it is cooled by the fan to keep from burning out, because when the fan died the link burnt up. anyway, i soldered in a wire (the ends of the links are still there to burn out), fixed the fan and its good as new. Maybe you have a problem with this link if the fan isnt running very well.

I kinda doubt this is the issue, but its worth a try

Lotus00

I dont know if this applies to all years, but once my fan got stuck (the thing was off-balance) and there is a fuseable link in the fan assambly. i assume it is cooled by the fan to keep from burning out, because when the fan died the link burnt up. anyway, i soldered in a wire (the ends of the links are still there to burn out), fixed the fan and its good as new. Maybe you have a problem with this link if the fan isnt running very well.

I kinda doubt this is the issue, but its worth a try

T-rexnut

Hey thanks for the replies:

After thinking about it for awhile, there is a higher blower speed used for max cool on the air conditioner, which did not come with my 1984 GS. I need to know on the connection block on the blower motor(the one that makes connections to the resistors inside the blower motor housing) where to put a jumper for getting that higher blower speed.

Thanks

Rotaries Forever

LongDuck

Top speed is 12 volts, direct. There is no 'jumper' that will increase your fan speed, unless this jumper includes a separate car battery in your storage bin wired in series...

I remember that thread and even posted to it. Same information as above.

Replacing your fan with a new unit from PEP Boys (yes, they have it) will help to restore performance, but wiring will not fix this problem. HTH,

T-rexnut

Hey thanks y'all I will try direct connect to 12 volts and see if that speeds up blower fan.

Rotaries Forever and ever AMEN

Pele

iTrader: (28)

That higher blower speed on the Max Cool is just recirculate...

When on recirculate, the blower appears to have a higher speed because it isn't drawing air through the extra fresh air intake ductwork.

It works the same on every car.

Bolox

just a though..

doesnt the heat come from passing a current thru a wire (resistor) that then heats up...

the amount of current running thru the wire would be fixed at max fan speed...
so if you increased the fan speed.. you'd be blowing more air thru, but the air would be at a lower temp coz it has less time to be heated up by the wire coz its moving faster...
=> the air actually seems cooler than it is now.

does anyone understand? or am i on drugs?

-Cheers

Pele

iTrader: (28)

The resistor is not for heating the air... It's just for limiting the power to the fan motor.

Bolox

well replace resistor with whatever heats the air (the coolent pipes, IIRC), and you still get the same thing..

its just more air moving faster over the same heating area

Pele

iTrader: (28)

I don't think you understand... The resistor is just for limiting power to the motor on low speeds... There's actually three resistors all packaged together.

You have 4 fan speeds.

1 runs the power through all three resistors for a slow fan.

2 bypasses the first resistor, only two resistors means a little more power to the motor and slightly faster fan speed.

3 uses only one resistor for more power and more speed.

4 completely bypasses the resistors and runs full power to the fan motor for high speed.

They have nothing to do with heating the air. They just control how fast the blower spins...

The blower blows air across the heater core (Connected to the engine's coolant system) or the A/C evaporator coil (If equipped)...

The heater and fan are two totally seperate components, although they're connected together for the purpose of heating the car.

I don't get what you're trying to do... Increase the heat in the car? You'll have to block off part of the air flow to the radiator.