Wheres heater fan on 91 e150

Exterior fan under the hood near firewall may not be getting the feed from the dash switch or is malfunctioned. Check for any fuses that may be blown and test the wiring at the heater core fan for 12 volt DC currant with a test light as switch on the dash is turned on

there is usually a fuse for this should be in the line up front somewhere as an accessory item and should be at least a 15 amp..you can check the blower separetly and see if it works..ooppss..check the heater hoses for shut off water valves.. there are 2 , one on each hose(usually under the hood) open these up and the heat should transfer..

I would check the fan relay under the hood in the fuse box and the switch itself.

open hood,look in main fuse box for blown fuses,or bad relays to heater fans. the a/c fan should come on only when you turn a/c on at the dash panel only. it has nothing to do with the heat. if the heater blower fans don't come on, then look in the main box[fuse] for a blown fuse also. otherwise the problem is in the heater control module.[where you turn on a/c and the heat] that panel has a different fuse location.under the dash drivers side or on panel on drivers door at the door jam[where the door shuts towards the front of car,under mirror,but inside] look for fuse panel there also for blown fuse. hope this helps,but if not,recommend you seek a pro.such as cadillac

you may only have a blown heater blower fuse, look in the fuse box for a blown fuse.check both fuse boxes, including the black fuse box under the hood. if fuses are good, try tapping on the fan box on driverside under dash, sometimes leaves get in it and stop it up. if you don't find the fan box under passenger side dash, look under hood on passenger side on firewall. hope this helps and thank you for choosing fixya.com

First check and confirm the fuses related to heater in your car.Fuse #12 (40A) in the under-hood box powers the blower motor. Fuse #14 (10A) in the under-dash box powers the blower motor relay as well as the A/C compressor clutch relay, A/C condenser fan relay, power mirrors, radiator fan relay, recirc. control motor, and rear defogger relay.If the fuses are blown then replace the fuse and check.But if the problem is still there then Its a heater relay problem,.The blower motor relay is in the under-hood fuse box. It's larger than the rest, on the back side, labeled RY6.Remove the relay. With the ignition off, use a 12V tester to locate the constant-power socket, which powers the motor via the relay. Then with the ignition on, locate the switched-power socket, which powers the relay. Verify that neither of the remaining two sockets is powered, then with the ignition off use a continuity light to determine which is ground. The last socket goes to the motor. (If the continuity tester lights on both, it's probably because the motor has fairly high resistance, and you'll need an ohmmeter to determine which socket is ground and which goes to the motor.)With a fused 12V power source, power the relay's coil contacts and check the other two contacts for continuity. If the relay doesn't work, replace. But if the relay is also checked ok.then in that case the blower motor is faulty causing this problem.Make sure it has power at the connector and that the connector is properly seated. If the power and ground connections are fine, then the motor is bad. ----------- This troubleshooting procedure will help you to confirm the possible problem.Thanks.Helpmech.

Look in the fuse/relay box under the hood,on drivers side,if the fuse is not blown,check for a bad relay near the blower motor,or in th relay box.If all this checks out,it can be the control head,it is a system with sensors all over the place,and any of them can cause the problem.But it does sound like the control head.

The front blower motor is controlled by the blower resistor module.This is usually the problem with the front blower not working.I looked up the schecmatics and I don`t see separate fuses for the front and rear.But the fuse for the front blower is in the under hood fuse block.If this is good then The problem is probably the resistor module.It is next to the blower motor.The connector from the resistor connects to the blower motor.If you want to confirm this you can check for power and ground at the blower motor connector when you activating the blower switch on.This can be done with a test light.Make sure you have power going into the resistor module also.If you have power going in and no power at the blower motor then replace the resistor.Hope this helps.Good luck.

Hi: Sounds like a possible heater resistor problem. First check to see if heater fan working, unplug heater under hood and put 12 volts to it from the battery with a wire (single black wire running to back of fan). If works then problem probably the resistor which is located on the fan housing under the hood to the right of the fan. The resistor has wires to it running from the heater fan, 2 - 7mm screws holding resistor in place, check resistor to see if any of the 3 elements are melted off, if so replace. Note: Rear window defrost has nothing to do with heater fan. Hope this helps...

I'm not sure where you are based, but with most new vehicles there is a 3 year or 60,000 mile warranty, so it should be covered under that if there is a fault. I recommend taking it to the dealer if the warranty is still current, otherwise if it is not you could check through the fuses to make sure it's not just a blown fuse, maybe check the wiring to the fan motor under the dash to make sure it's still plugged in and not damaged, and (with the key on and the heater fan switched on) check for power to the fan motor with a testlight. If there is power there then the fan motor is faulty, if not then there is fault with the control system, but that is probably about as far as you could go at home. Obviously if the fan is faulty you could replace it yourself if it's easily accessible. Any further faults would need a Honda dealer or good auto electrician to diagnose.

Hope this helps,
Mark.