[Mark Hans]

Hello Again. My heater blower works on full power, but on half way, motor stays still. Is this the switch or something else? . . . (before I take half the car apart to get to it all).

Thanks

 

[GoldGT]

Hello Again. My heater blower works on full power, but on half way, motor stays still. Is this the switch, or something else (before I take half the car apart to get to it all).

Thanks

If this is a GT there is a power resistor mounted on the heater blower box. If the connections there are bad it won't work on low. Also if the motor bearings are full of old grease then the motor may have enough torque to turn it when at full voltage but when dropped to the lower voltage for low speed it may not have the torque and therefore it will not work. Check the resistor first, follow the wires up under the dash.

 

[wrench459 (R.I.P.)]

Just to add more to Jeff's response.
There's two B+ wires going to the resistor from the rocker switch.
One(high speed) is legged straight to the blower the other(low speed) has to travel through the resistor.
Getting to them without the dash removed is a !$%# on a GT.
It might be a good idea to check the rocker switch first.IMO

 

[hrcollinsjr]

Just to add more to Jeff's response.

Getting to them without the dash removed is a !$%# on a GT.
It might be a good idea to check the rocker switch first.IMO

Just to add to Dan's response. Depends on the GT. Some have the terminals where they can easily be gotten to under the dash on the passenger side. IIRC the earlier GT's had the terminals on top of the blower housing making it a wee bit more difficult to get to, hence Dan's frustration with the connections. :haha:

Harold

 

[wrench459 (R.I.P.)]

.. Depends on the GT. Some have the terminals where they can easily be gotten to under the dash on the passenger side. IIRC the earlier GT's had the terminals on top of the blower housing making it a wee bit more difficult to get to, hence Dan's frustration with the connections. :hah

You aint just a kiddin there HC.
Yep early GT. Pictured is a '69 case.

 

[Mark Hans]

Heater Switch-Motor

The dash is hanging out at the moment as I am sorting out the steering lock, so replaced a few bulbs, sorting out some MOT stuff (no high beam w. lamp).

I'll check the wiring and indeed the resistor.

Thanks everyone for your help!...

Mark, Amsterdam. :veryhappy