Question about Infiniti QX4
The blower is controlled by an electronic device located under the dash called an air conditioiner relay. You most likely have one that is on it's last legs, which explains the sporadic action.
If you have an auto zone near by drive there and tell them you need a new A/C relay. They will generally not only sell you one but even install it. All it requires is to unplug the old one and plug in the new one.
Posted on Aug 04, 2009
Motor brushes may be getting stuck and need to be worked loose before turning on, or it may have a relay in the wiring that is not clicking right away.
Posted on Aug 04, 2009
Many/most vehicles have a resistor in the circuit that have been known to act same as you describe. Best thing is to follow harness back from fan motor and see if you can find another connector on heater/AC duct work or on opposite side of firewall under the hood, directly or close to where heater fan would be. The most common result of a bad resistor is that blower only runs on high, but I have had some same as yours. If you give me year & model of vehicle, perhaps I can pinpoint resistor location better.
Posted on Jul 31, 2009
Sounds like the fan relay has build up on the contacts or it's just going bad.should be located under the hood in the main fuse box.
Posted on Aug 03, 2009
Check your blower motor relay under the hood it sounds like it may have gone bad. just swap a different relay in it's place if it works then it is a bad relay, buy a new one and replace. if your relay is good then check your wiring to the blower motor look for power and a ground. if that checks out then your entire blower motor resistor pack is bad. hope this helps you out. if you post any other comments I will be glad to help you out.
Posted on Aug 01, 2009
If the blower motor is not working then you need to check:
1. The fuse or relay is bad
2. The switch is bad
3. The blower motor resistor is bad (located way under the dashboard)
4. The BCM (Body Control Module) is not communicating with the other computers
If still it does not work and all the above components are fine then unfortunately you’ll need to replace the blower motor itself.
Please do accept the solution if the issue is resolved or else revert for further assistance.
Posted on Jul 25, 2009
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Posted on Jan 02, 2017
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