Assuming you mean "increases" in speed, as you accelerate the engine the HVAC (Heating Ventilation Air Conditioning) system is loosing its vacuum supply to function properly. Normally the system depends on a vacuum reservoir to maintain operation. This happens when the vacuum supply from the engine is leaking because of damaged/cracked/pinched vacuum lines. Inspect all the vacuum lines associated with the HVAC system.
the blower fan rheostat usually located in blower box is like a resistor that draws energy from the blower fan supply to slow it down and there is a high speed fan relay for the fastest speed. So your rheostat is not working
I think you mean slow down and speed up. slow down =slow, speed up=fast
The blower motor is tired. It will eventually blow a fuse and/or burn out the blower motor speed resistor. Time to replace the blower motor. Also check connections for high resistance damage (melted connections).
slow down
speed you up
Speed up
Slow Down to the Speed of Virginia - 2013 was released on: USA: February 2013
population growth begins to slow down
Nothing happens to the forces. The forces are what makes the thing speed up or slow down.
Gravel cannot slow down a river because rivers flow in all sorts of angles and speed.
resistance is use to slow down and amplify can use for speed up the cell division
They speed up.