blower motor not working, took it out and have power on hot wire but no ground. Video on YouTube available. The resistor pack is usually located in the air ducting, in the blower fan airflow. If you do not, check for a good ground, if you have a good ground check for that fuses link if it applies to your Trailblazer. OK I tried to post on some other thread about this . They cut it off of a new wiring harness and spliced it in. I need to find the location of this front blower relay and the fuse that powers it. Step 2: Remove the service panel on the A/C unit. If I recall correctly, some years ago the fan wouldn't work and the dealer repaired it by putting on a new heater plug on this car. i figured that out. I have 120V incoming power to the motor … (1)there is a plug that is about 12"away from blower motor.follow connector from motor towards center of dash easy to find.get rid of connector and butt connect wires.if not bad now,will be later. A furnace blower motor that stops pushing warm air out is not the same as a blower that is forcing only cold air into your home. 4 Posts . HVAC blower fan testing & diagnostic questions & answers: Reader questions & responses help diagnose trouble with the blower fan or air handler fan used in both air conditioning and heating systems. we blew a fuse for the cigarette lighters. Easy thing to do is unplug the Blower motor and check for power and ground when the switch is on. Without it, the AC system will not be able to circulate any heated or cooled air. One of the first symptoms of a problem with the blower motor relay is a blower motor that does not function at all. Like all moving parts and similar to stand alone fans, the blower motor and blower fan is susceptible to wear and tear, as well as damage, all of which could result in the air circulation being restricted, or possibly not working at all. The other sends a signal back the the switch module and should read about 1/2 of the first one. DO NOT proceed if you’re not sure you’ve properly shut off the power. The blower motor relay supplies power to this motor when you turn the switch to "on" that can sometimes fail. 1. Also did you check the blower motor itself. So the blower motor was not the solution. It's always dead. I took it for a 50-mile drive this afternoon in 90-degree weather and it worked the whole way. Your car's blower motor is not only necessary for the operation of your air conditioner. Riverside, California. Thanks Jo-Ann I turn on the fan and nothing . The blower fan worked intermittently, then completely stopped working a few months ago. I do not have any blown fuses or relays . Then check for power at the red/white wire at the blower motor connector (Key on, blower set to high). You have one of three likely problems: your blower motor has failed; the motherboard in your control box has blown, or the fuse to your blower motor has blown. When this happens, you may notice that you will not feel anything blowing out of the vents at all. If your blower isn’t working or works intermittently, don’t automatically assume you have a bad blower motor. Here’s a quick breakdown. I changed the resister, and the connecting harness that connects to it. But if i hit a bump or deep in the road it will kick on! NAIOA - Forums - no power to the blower motor, its not the resistors... - so randomly my blower motor stopped working on my 2005 monte carlo. Basically, +12v power is supplied (via fuse) to the fan speed control switch, which then passes via the selected speed control resistor, to the fan motor. It’s located on the side of the building near the outdoor A/C unit. One goes from the fan switch to the circuit board on blower motor. I have a 19998 F250 power stroke, My blower motor is not working. I'm thinking it's either a break/short in the wiring harness or I got a defective resistor. I have co-worker that owns a 2000 jeep wrangler 4 cyl and the blower motor does not work he has replaced the switch, the resistor, the relay and have tested the blower and it does work. Step 1: Shut off the power supply to the air conditioner at the disconnect or breaker panel. The blower motor relay is the electrical switch that is used to supply the power for the vehicle’s blower motor. Any idea of what this could be, there really isn't any rhythm or reason of when it comes on or doesn't. So not sure what's up ,I guess it's needs to be replaced. I replaced that fuse, but after that the interior blower fan wouldn't work. Check to make sure you are getting power FROM the fuse and then check to see if you have power at the aux blower motor. I work in the telephone business and am very familiar with DC wiring. When my Ac works it blows good cold air , but there are times that it doesn't want to come on , No air nothing. SOURCE: blower motor doesn't work and has no power to it. there are 2 problem spots for blower motor problems on an m2. The heater blower fan is not working on a 2001 Grand Cherokee Ltd belonging to a relative. Click here to view spa blowers. Step 3: Find the start capacitor for the fan. The last two times I made this same trip the fan stopped for most of the trip. Blower will no running on neither auto or fan. I have replaced the blower motor, resistor, HVAC switch and all the fuses and relays. I had a chance to look at it. If you hear that the blower motor is operating but don't feel any air flowing through the vents, the problem is with the airflow controls [source: RepairPal]. Everything there seems to be fine. If the unit has power and the gas does not come on, more than likely the ignitor failed. It never works on any speed setting. Hey guys, we just went on a vacation. Step 1 – Check to see if power is getting to the fan. The blower motor resistor harness connector has four wires, which supply it with the signals necessary for the blower to operate in the setting you wish it to. This article series discusses how to inspect and test a heating or air conditioning indoor air handler blower fan that is not working. If you’re not getting power, follow the instructions below. Check the blower multispeed control resistor pack is not faulty. Start by checking for power with a test light at the blower motor fuse (key on). If the module does not like the signal it receives in return it can discontinue power to ask the motor to run. Solution: Put the resister in five minute fix and the fan was up and running again. put fire to motor outside and is working. Sometimes not all the time. My blower motor is not working. Mar 5, 2012 #1. Hello, I have heat pump unit with a backup auxiliary heat. so then i figured the blower motor was not working.. took it out and bench tested it. I have checked all fuses under the hood and under the dash. It should read about 0-6 V depending on switch setting. I expect it is a relay, but I cannot find where these are located. Test the power on the blue and black and … 34 Posts . Power may not be making its way through to the fan. I tested the blower motor with a 12 volt source and it worked. So the fan can go completely out and the resister can be the culprit it. The Haynes manual says the blower is activated by a relay. So I've been reading and searching around for a few weeks now, nothing. All this is assuming the blower is not working. I replaced the resistor, but it still didn't work. I have same issue, fuses are fine, fan does not work at all, have pulled blower and applied power- it works. Discussion Starter • #1 • Aug 31, 2010. 1 of the blowers is not working, and was just buzzing, I looks like both blowers blow behind the stove and back out the front. Joined Jan 26, 2012. 8 times out of 10, when the blower motor stops working, it's the motor itself that has fried but not always. Although the motor is one of the most reliable components of the system it won’t last forever. I also checked the fuse and the fuse is good also, there is power coming from the connector going into the resister, but the pigtail that comes from the resister and plugs into the blower motor does not have power … 33 0. It has the automatic sensing heater a/c unit with digital readout. I have checked inside the fuse box and it shows power … from what i atleast thought was the blower motor resistors, 2 wires coming from the blower motor purple and black . Checked the fuses, relay and even tried a new fan motor. Blower A belt turns the blower motor to distribute heat throughout the house. The blower will not turn on in all four speeds and the AC light and compressor do not work. In this tutorial, I'll show you how to test the blower motor and blower motor relay on 2001-2005 1.7L Honda Civics in a step by step manner. Discussion Starter • #1 • Nov 1, 2014. Without a functioning blower motor your engine runs the risk of overheating. Haynes say it is located in the PDC under the Hood, along with a 40 amp blower fuse in the PDC. It appears you have not yet registered with our site. My blower motor does come on. My blower will not come on neither heat or cooling mode. The blower motor is the component responsible for pushing air through the vents of your vehicle’s heating and air conditioning systems. The wheel is free and turns. If you have cool air but a steady airflow, your blower motor is working but your heat exchanger or burner is not. Gave me a new one. The blower and AC stopped working on a 1998 Beetle. Not to sure if its my blower motor or some type of electrical problem. I replaced the switch for the fan control, but that did'nt work. In this video, the customer was complaining of her blower motor cutting out intermittently. It never works while driving, it never works when turning the key to start->on. Blower motor has no power Posted by AKUMA1975, Mar 5, 2012. I took out my blower and test the power on it and it works. Remember that it’s possible for the blower motor to fail itself. Nothing. The guy at the parts store suggested to check it since it was a warranty part. You have power to the switch, vent controls are working, rear de-ice is working, but blower is completely dead. So I did not think it was that. I cleaned it out, lubed the motor, and put it back together. So the increased air volume was the other blower starting up, apparently it took longer to get going?? If blower motor works on full speed then it is the resistor which is under the glove box on 2007 rabbit. Your blower motor in your spa stopped working. Blower motor does not function. This guide shows you how to check and replace the blower motor fuse in your spa control box. This may also cause the blower motor to work intermittently. If so you need a motor (which is probably the problem). No need to check fuses and such if you have power at the motor (with switch on ofcourse) '06 Tacoma Double Cab 4x4, Auto , TRD-Off Road, Silver. I finally got around to working on it a week ago. I’d jumped the motor and is working. Check the furnace flame for a complete blue color. I found out by the diagram that i was going about this all wrong... there isn't supposed be power at the switch... its all ground, the blower motor always has power when the key is "on" all the switch does is cut off the ground for off and give some ground for low, medium etc. However, if the only speed the fan is missing is the high setting than the likely cause of the problem becomes the high-speed relay. 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