During my 50-plus year career as a General Motors and ASE Master Technician, vocational educator and vehicle owner, I have repaired or replaced countless heating, air conditioning, and ventilation ...

Most furnaces have a relay switch on the door cover ... so I just ignore them. To increase the blower speed, I remove the black wire, replace it with the yellow one, and then put the black ...

These can be the blower motor relay, open fuse ... 6 and 7 during steady speed, and low speed operation to increase fuel economy. The issue could be a faulty valve lifter or MDS solenoid.

If the furnace has a PSC (permanent split capacitor) blower motor, determine the heating speed taps used on the circuit board or fan relay. Single-stage furnaces are the easiest; they use one heating ...

My 2005 Vauxhall Vectra's heating system only works only setting number 4. The fan resistor was replaced by Vauxhall; stil not working. Fan motor was then replaced by a second mechanic - still not ...

And the world's quickest heaver is Oshkosh Trucks' latest H-series chassis with a high-speed snow blower. Although it doesn't look much different from other Oshkosh H-series snow trucks (it's no ...

Maximum air velocity, on the other hand, describes the speed in which air moves through the blower, which is often depicted as miles per hour (mph). This is another important element to consider ...

See All 5 Photos With the engine spinning at 1,000 rpm, the blower speed can vary between 8,750 and 88,125 rpm, contributing torque-filling boost more quickly than a two-stage turbo or a clutched ...

Boost pressure is really just backpressure that has not made it through the engine. For any given blower speed, the lower the boost, the greater the power. We know this seems backward since more ...

The drive ratio alters the blower speed and therefore changes the boost. How is this Mad Max-like? Because you can dial a low 1 or 2 psi for driving around town and then crank it up to the blower ...