Question about 1998 Jeep Grand Cherokee

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Interior fan won't run to run A/C or heater. I

Interior fan won't run to run A/C or heater. I have checked all the fuses and they are not blown???

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If blower only works on high speed I would say blower motor resistor but if it does not work at all I would suspect blower motor. Make sure you are getting power to motor if not it might be blower motor switch.

Posted on Jul 02, 2009

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Heater fan does not get power.


There are two fuses for the blower. One for the relay coil and the other for the relay power. One is a 5a in the interior fuse box. The other is a 40a in the engine compartment fuse box.

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If fan still runs when all your heater control knobs and buttons are off, it is likely a bad heater fan switch. Unless you have something like a body control module found on newer cars that has some control over interior functions. If not, try a new heater fan switch. Good luck.

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If my interior fan on my 2003 honda crv is not working ,is there a fuse for it or what can i check ?


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Heater blower doesnt blow


You didn't say if you've checked, but maybe it is as simple as a blown fuse?
Try to locate the fuse panel in the interior of the van... often just above the feet of the driver or in one of the kick panels on the side of the driver. (Often the driver's manual will tell you where the fuse panel is... there often are two... one in the engine compartment and one inside the car.)
Check all fuses.. they MAY have the heater fan one labelled or identified in the operator's manual. Often fuse boxes have a little plastic tweezers to use to grab and remove the fuses. Most fuses are clear colored plastic with two flat prongs as the plugin. To see if they are OK, there should be a metal tab between the two prongs inside the clear plastic... OR that tab may be melted or burnt out. Only replace with the same "size" / color of fuse.

If all fuses appear to be OK, then you may have to get at the wires that hook onto the heater motor or to the switch. It will certainly involve crawling upside down under the dash usually on the passenger side... or if you are lucky, look under the hood in the area directly in front of the passenger for the heater fan. Check with a voltmeter if there is 12V getting to the fan. If there is... then likely you have to replace the heater fan itself. For a 1999 vehicle you may be lucky enough to be able to go to a Pick-Ur-Part and pick one up... or buy one at an auto parts place.

If there is NO 12v at the heater motor, and no blown fuses, then it MAY be the fan switch... which probably involves major surgery on the dashboard to get at it. (It likely is NOT the switch.
Good luck... I hope you don't live up in a c-o-l-d area like here in Canada and are driving without heat at -15 °C !!!!
/denis

Dec 10, 2010 | 1999 Chrysler Town & Country

1 Answer

Heater blower on 2004 Sebring Convertible stopped working. I just replaced the heater resistor 3 weeks ago and all fan positions, 1, 2, 3, 4 worked awesome. I'm looking for a diagram for the interior fuse...


CHECK FOR VOLTAGE AT HEATER BLOWER MOTOR IF NOT YOU COULD HAVE A FAULTY BLOWER MOTOR RELAY.IF YOU HAVE VOLTAGE AT BLOWER MOTOR THEN BLOWER MOTOR FAULTY.

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You probably have a blown fuse,locate your fuse box and check

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Under the dash fuse box ,fuse 15 (TCM ECT) is a combination of cluster, heater and headlights.probably a relay fuse!!!!! fuse 16is a relay fuse.

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Run a 12 volt jumper lead to the fan motor connector from the battery or fuse box, if the fan runs replace the fan speed control module

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