Replaced the blower motors and had Air Conditioning. Now no heat
I had no air conditioning and they replaced the blower motors because it was also over heating. I had air after that and now that it is winter, I have noticed that I have NO HEAT and the over heating has started again. What can I do?
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The blower, if working sporadically should be replaced or the relay to it. If the blower is on all of the time that the ignition is on, but air isn't coming out of the vents, there is a vacuum motor problem in the heating ventilation and air conditioning system, behind the dash board and hvac panel.
The compressor on the air conditioner in my 2000 GMC Yukon XL went out last summer. Had it and the whole line replaced at a local air conditioning shop last fall. Used it little before cold weather. Warm weather this spring and no cold air. We could hear the compressor trying to kick in. The shop told us that the control console was bad and had to be replaced. They told us the part was on back order and did not know if they would be abel to get one any time soon. We took the Yukon into the local GM dealership. They told us that the high side fitting was bad and that the freon was very low and that they would have to deal with that first to check the system. Called back to the air conditioning shop and they said they had a console come in and they would put it in and check the high side fitting. I now have cold air and questions. Bought Yukon in 2005 used, had always had problem of not switching to cold air once the heater has been used. We were told changing the console should fix that. It has not changed. I feel like the console angle was a scam, that the system was just low on freon. Each shop was blaming the other for trying to scam me. And what can fix the heat to cold issue? If anyone has answers I would sure appreciate the knowledge.
It sounds like the blower resistor needs to be replaced and the blower motor it self. Auto Zone will have the blower and resistor that you need to replace and will have the step by step instructions for you to get the job done with common tools and will take about 2 hours if your good with tools. Good luck and keep me posted. Setting 5 should have 12 volts running to the blower motor so check the wire harness for voltage readings at the blower motor harness clip, you may only just need a new blower motor.
could have debris in the fan housing or the blower motor bushings or bearings are going out. take the fan out of the air conditioning case and vacuum out the air conditioning/heater core assembly case. then hook everything back up and see if this works.
Replace power module. Its under the hood. In the air duct up against the firewalll. About 12" to the left of the blower motor. Has 2 connectors on top. Its black. May be hard to notice. Probably have to remove cross brace to get at.it. Then remove 3 screws and pull it out. Put in new one. Reattach brace
The blower motor works on high setting ONLY when the blower resistor is
bad. The blower motor resistor is held in place with 2 screws and
attached into the heater housing under the right side of the dashboard.
You can identify the resistor by the big wires that are connected to
the connector. If this heating/cooling system is the auto temp type,
the part is a bit high on the price.