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Re: 1999 heater fan
The Blower motor (heater fan) is under the dash on the passenger side of the car. there is a panel that has to be removed to get at the fan and can be removed with a small pry bar and patience. before the fan gets removed, check the fuses first, also check the motor by disconnecting the wires going to it and putting power directly to it (this will take some small wires to do). By doing all of this, you will determine if the blower motor is actually the problem. if the fan works when it has direct power, then the problem is someplace else.
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If its the fan thats not coming on then i would check the blower motor resistor these are known for losing there connection at the pigtail.The location is usally on the passenger side down close to floor mounted on the heat duct with two screws.First try wiggling the pigtail with the ignition and fan switches on.
The heater core is located on the passenger side of you Jeep. My 1995's is under the dash behind the plastic panel for the vents. Yours will be right around there also. If you open the hood and look where the blower fan for the heater is, passenger side firewall, just behind there. Hope this helps
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
if you are talking about the engine electric cooling fan..it will run after car is turned off until temp goes down then it shut off..unless you're talking about the heater blower motor..then i would look in the engine compartment passenger side firewall for the heater box ..on the box there is speed control resistor for the heater fan speed..that might be shorted.if not fan switch on dash..give more info next time..it makes it easier answer with more info
I dont know what these other guys are saying..I think they snif the glue!!! YOUR BLOWER FAN ASSEMBLY CAN EASILY BE REMOVED !!
1. Remove the wire
2.Find the "tab on the housing and pull it down while rotating the fan housing counter clockwise. This will remove the fan assembly. Plage 12 volts on the contacts to test the motor. If it works then the resister pack is blown. On the fan housing (near firewall ) you will see a plug going into a square looking box with a screw in it. Remove the wire then remove the screw to remove the resistor pack.. A new resistor pack is around 20 dollars at a ford dealer. Hope thie "FREE" info helps!
it is probably the fan relay which controls all 3 speeds for your heater and cooling a/c fan in the 99 pontiac sunfire it is located on the passenger side firewall under the dash about 1/2 way up it is a white circuit board about2 x3 inches and plugs into a circuit on the firewall about 75.00 to replace if you do it yourself otherwise labor is xtra
open the hood and stand in the front looking to the firewall you will see the blower housing on the left side (passenger side) if not open passenger door and look under the dash it may be in a box that is hooked to your air flow vents.
you can remove it from under hood passenger side firewall unplug motor remove around 6, 5/16 screws remove air hose bottom if it has one pull out replace with new one or oil bearing in old one approx time start to finish 1 hr