Can you use wd40 on furnace motor?

Don’t over-lubricate Some older furnaces have two motor bearings and two blower shaft bearings that require annual oiling. wd40 is actually more of a penetrating oil, not much of a lubricant. It is great in it’s own way but go with the Zoom spout or 3-in-one type machine oil.

What’s the problem with my Chevy Suburban heater?

Just no temp control. Actuator door quit working and would only blow hot air on driver side and cool air on passagner side when in ac mode. Drivers side a/c switches to heat, while passenger side blows cold. Replaced drivers side door actuator, did not fix problem.

Why is my AC not working in my Suburban?

The heater will only work when the car RPM are increased and will not heat the back vents at all. There is a continuing clicking sound coming from the dashboard. Occasionally hot air would start blowing on driver’s side, but nowhere else. Stopping and restarting engine would fix it.

What should I do if my blower motor stops?

Replace blower motor. If you have a variable speed blower motor, replace the blower motor speed control module. If you have a three or four speed blower motor, remove the blower motor relay. If the motor stops, replace the relay. Alldatadiy.com and Eautorepair.net are professional-grade shop manuals—period.

Why does my Suburban Z71 have no heat?

2003 suburban z71 with duel climate control and rear controls no heat in front or rear sometimes rear will blow warm if reving rpms countinously. , blows cold air out of vents. When cycling the duel climate control levers up and down there is a change in air flow but not temp.

Why does my Suburban Air Conditioning only work on setting bar 3?

Thanks for helping-our 2005 suburban air-conditioning fan only works on fan setting bar 3, on the other settings the fan shuts off. The rear fan has no problems. Is this a function of the controller going bad or does it have to do with vacuum lines?

Why are my a / C vents on my Tahoe not working?

My 2007 Tahoe’s front A/C vents do not have air coming out of them. It appears that the vent control is stuck on the floor and windshield and will not change. Any ideas on what could cause it to quit working?

What causes a blower motor to overheat?

Decreased airflow causes the blower motor resistor to overheat and fail. Reduced airflow also causes the blower motor to work harder, draw more current and that can cause repeat blower motor resistor failures. Blower motor is drawing too much power. Check the cabin air filter for clogging.

How can I tell if my blower motor is failing?

On all systems, a failed blower motor is least likely. Blower motors generally don’t fail out of the clear blue. In most cases, they start to fail by making a high pitched squeal or screeching noise that indicates the bearing is failing.