Heater fans seem non-existant when stationary

[mattnorgrove 0]

As above really, just done the resistor repair on the blower motor, now works on all speeds.

 

Ensured the heater blower is seated correctly (had it out again and rechecked)

 

When driving, there is plenty of air from the screen vents, but when stationary you can barely feel a draught :mad2:

 

This surely isn't normal?

 

Any ideas anyone?

 

Thanks in advance! :D

[Lufbramatt 0]

if you look a the aerodynamics of the car, the "corner" between the bonnet and the screen is a high pressure area where air kinda bunches up rather than flow straight over the car. The extra pressure here (where the heater intake is) forces more air through the system when your going along :)

 

The heater motor might be getting a bit tired though which is why it needs a helping hand by the air pressure- which would explain why the thermal fuse in the resistor pack blew- so might be worth taking it out and giving it a clean out and lube/replace the bearings. Apparently you can get ball bearing races meant for radio control cars that will fit in place of the stock bearings, so might be worth trying a decent model shop that does RC stuff as they normally have a box full of random ballrace bearings you could look through.