Heater only works at high speed

[Clarke]

Hey
My heater blower motor went on me a month ago so I replaced it with a brand new on from ford. Now I only have high speed. no low no middle.
Is this a switch problem or did I get the wrong blower motor?

 

[DeRocha]

Take a peek at the Heater fan resistor pack thread in the Heater and A/C forum

The resistor pack steps down the power for all settings other than high. For the high setting the circuit by-passes the resistor pack and sends full power to the fan... The resistors are like the filaments in a 3-way light bulb and will burn/out break over time causing the symptoms you have...

 

[Clarke]

thanks for your help. hopefully thats the problem.

 

[Potomac30]

Don't forget to vacuum the leaves and pine needles out while your in there. It'll help prevent that annoying flash fire in your ductwork.

 

[Clarke]

LOL thanks i take it you speak from experience
thanks for the warning

 

[thewishkah]

Yeah hes right its 99% the resistor I had to change the one in my EX times.

 

[Clarke]

thanks guy
i change that resister thing and its all back to normal

 

[DeRocha]

thanks guy
i change that resister thing and its all back to normal

Glad to hear everything is back to normal

 

[bikerchick4God]

Thank you I needed this!

I'll get onn it next week

 

[ScottT80]

Does anyone have a picture of this? What about a part number? My '91 needs the resistor pack replaced too.