Question about 1998 Oldsmobile Intrigue

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A/c will not blow on high

My A/C started to make noise and stopped working. I replaced the blower motor and unit started working without noise, but will not blow on high setting. What can I do to fix this issue?

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  • Oldsmobile Master
  • 21,873 Answers

Could be the high speed blower relay. On most models the lower speeds are controlled by the resistor and high is powered by a relay.

Posted on Jul 25, 2013

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Posted on Jan 02, 2017

  • 28 Answers

SOURCE: Heater/AC fan only works on High

Bencar1 is right. The problem is probably the resistor. But it also could be a burned terminal in the 4 prong plug that attaches to the resistor. There will be burn marks on one of the prongs of the resistor if this is it. Look for the obvious. Good luck.

Posted on Nov 11, 2008

nyspeter86
  • 81 Answers

SOURCE: heater motor

Have you confirmed there are no blown fuses or tripped circuit breakers?

If you hit the blower box a few times does the motor come on? (If yes, there's a bad connection somewhere).

Have you ruled out a defective head unit?

Have you ruled a defective ballast resistor or resistor block?

Posted on Dec 30, 2008

  • 5 Answers

SOURCE: Heater blower motor speed control problem

sounds to me like you have a resistance switch problem. The old cars had springs, i. e. resistors to control the speed of the motor. newer vehicles have electronic controlers, they can be very sensitive to corosion. first check the plug the replace the switch.

Posted on Oct 31, 2009

  • 368 Answers

SOURCE: heater blower motor starts off

1) Your blower is getting bad, the motor starts out normal, as it get going the blower motor becomes hot and shut down 2) You have debris stuck in the blower fan, you need to locate the blower and clean the airway if it is clogged. 3) Checking your relay, as relay could be bad and not providing the voltage to it.

Posted on Jan 31, 2011

jturcotte
  • 7754 Answers

SOURCE: My blower motor started making a ton of noise. And

Follow the blower wires back to the resistor, which is screwed into the heater box. Remove the resistor and check for heat damage and continuity. Most likely it is burned up. The assembly also contains a relay, which is usually only used for high speed. The assembly is $32 at autozone.See pic below.
jturcotte_525.jpg

Posted on Jun 19, 2011

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Weak blower motor


Check good voltage and ground for blower motor. Actuators under the dash may be restricting air flow? High speed doesn't usually use a resister.
Check for hvac trouble codes, in my part of the country, some of the national brand autostores will check codes for free, if there are any.
If you think problem with blower motor, itself, replace it. Sometimes, you can remove blower motor, use jumper wires for voltage and ground, using inline fuse, come off the battery, see if it blows like you think it should?

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On my 1994 S-10 Blazer, the AC/Heater stopped blowing on high speed about 2 years ago. By switching the speed control quickly back and forth, sometimes High would work. But not anymore. I had the A/C...


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