a/c-heat will only blow sometimes, mostly @ initial start up of car but even then only if you’re lucky ? Once it does blow air if you turn off or turn car off/on will not blow again till next day maybe or get lucky ? But when does blow it is ice cold or hot heat, research online says Power Module or probably Fan Speed Resistor, but need a pro’s advice ? Please HELP
1998 Nissan Maxima
First thing I would test would be the blower motor. Direct positive and negative. Then I would use a scan tool to check for any codes with the body control module.
Most likely the blower motor is going out.
A quick test would be to check for power and ground at the blower motor when it is turned on but not blowing. If it is getting juice…. replace the motor.
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