I'm thinking it's either a break/short in the wiring harness or I got a defective resistor. 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. 1. Discussion Starter • #1 • Nov 1, 2014. I had a chance to look at it. Blower motor does not function. Checked the fuses, relay and even tried a new fan motor. Nothing. Blower A belt turns the blower motor to distribute heat throughout the house. My blower motor does come on. 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. Solution: Put the resister in five minute fix and the fan was up and running again. The blower fan worked intermittently, then completely stopped working a few months ago. One goes from the fan switch to the circuit board on blower motor. NAIOA - Forums - no power to the blower motor, its not the resistors... - so randomly my blower motor stopped working on my 2005 monte carlo. The blower motor relay is the electrical switch that is used to supply the power for the vehicle’s blower motor. DO NOT proceed if you’re not sure you’ve properly shut off the power. If so you need a motor (which is probably the problem). Check the furnace flame for a complete blue color. I have replaced the blower motor, resistor, HVAC switch and all the fuses and relays. So not sure what's up ,I guess it's needs to be replaced. It appears you have not yet registered with our site. Riverside, California. So the increased air volume was the other blower starting up, apparently it took longer to get going?? we blew a fuse for the cigarette lighters. I do not have any blown fuses or relays . Your blower motor in your spa stopped working. I have same issue, fuses are fine, fan does not work at all, have pulled blower and applied power- it works. If the blower motor doesn't work at all, you probably have a defective relay. Here’s a quick breakdown. If blower motor works on full speed then it is the resistor which is under the glove box on 2007 rabbit. I have checked inside the fuse box and it shows power … 8 times out of 10, when the blower motor stops working, it's the motor itself that has fried but not always. Your car's blower motor is not only necessary for the operation of your air conditioner. i figured that out. Everything there seems to be fine. Step 1 – Check to see if power is getting to the fan. so then i figured the blower motor was not working.. took it out and bench tested it. It's always dead. 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. It’s located on the side of the building near the outdoor A/C unit. 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. Also did you check the blower motor itself. This guide shows you how to check and replace the blower motor fuse in your spa control box. So I did not think it was that. I work in the telephone business and am very familiar with DC wiring. The blower motor is the component responsible for pushing air through the vents of your vehicle’s heating and air conditioning systems. Not to sure if its my blower motor or some type of electrical problem. My blower motor is not working. 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. In this video, the customer was complaining of her blower motor cutting out intermittently. I turn on the fan and nothing . Check the blower multispeed control resistor pack is not faulty. One of the first symptoms of a problem with the blower motor relay is a blower motor that does not function at all. I have 120V incoming power to the motor … Start by checking for power with a test light at the blower motor fuse (key on). 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. It has the automatic sensing heater a/c unit with digital readout. All this is assuming the blower is not working. I checked the fuse inside the car, but it was fine. 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 … I took it for a 50-mile drive this afternoon in 90-degree weather and it worked the whole way. Blower will no running on neither auto or fan. Without a functioning blower motor your engine runs the risk of overheating. Step 3: Find the start capacitor for the fan. 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. This may also cause the blower motor to work intermittently. The wheel is free and turns. SOURCE: blower motor doesn't work and has no power to it. I tested the blower motor with a 12 volt source and it worked. Step 2: Remove the service panel on the A/C unit. Click here to view spa blowers. Sometimes not all the time. Video on YouTube available. 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. Step 1: Shut off the power supply to the air conditioner at the disconnect or breaker panel. It should read about 0-6 V depending on switch setting. If you’re not getting power, follow the instructions below. You have power to the switch, vent controls are working, rear de-ice is working, but blower is completely dead. 33 0. The other sends a signal back the the switch module and should read about 1/2 of the first one. I’d jumped the motor and is working. there are 2 problem spots for blower motor problems on an m2. It never works on any speed setting. put fire to motor outside and is working. The resistor pack is usually located in the air ducting, in the blower fan airflow. (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. The blower motor relay supplies power to this motor when you turn the switch to "on" that can sometimes fail. So the blower motor was not the solution. I replaced the resistor, but it still didn't work. Gave me a new one. 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. My capacitor and transformer is also good too. Hey guys, we just went on a vacation. 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. When this happens, you may notice that you will not feel anything blowing out of the vents at all. Hello, I have heat pump unit with a backup auxiliary heat. 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. Easy thing to do is unplug the Blower motor and check for power and ground when the switch is on. I need to find the location of this front blower relay and the fuse that powers it. Thanks Jo-Ann I took out my blower and test the power on it and it works. If you have cool air but a steady airflow, your blower motor is working but your heat exchanger or burner is not. 34 Posts . It never works while driving, it never works when turning the key to start->on. 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. Then check for power at the red/white wire at the blower motor connector (Key on, blower set to high). If your blower isn’t working or works intermittently, don’t automatically assume you have a bad blower motor. 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. I replaced the switch for the fan control, but that did'nt work. Remember that it’s possible for the blower motor to fail itself. The Haynes manual says the blower is activated by a relay. Joined Jan 26, 2012. 4 Posts . 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 changed the resister, and the connecting harness that connects to it. The guy at the parts store suggested to check it since it was a warranty part. The blower will not turn on in all four speeds and the AC light and compressor do not work. I have a 19998 F250 power stroke, My blower motor is not working. But if i hit a bump or deep in the road it will kick on! My blower will not come on neither heat or cooling mode. I finally got around to working on it a week ago. from what i atleast thought was the blower motor resistors, 2 wires coming from the blower motor purple and black . Although the motor is one of the most reliable components of the system it won’t last forever. They cut it off of a new wiring harness and spliced it in. Without it, the AC system will not be able to circulate any heated or cooled air. blower motor not working, took it out and have power on hot wire but no ground. 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 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]. 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. OK I tried to post on some other thread about this . Symptom: Blower motor not working at all on any speed setting, and it never works at all. So the fan can go completely out and the resister can be the culprit it. The blower and AC stopped working on a 1998 Beetle. I did replace the blower resistor two years ago. I have checked all fuses under the hood and under the dash. Discussion Starter • #1 • Aug 31, 2010. Any idea of what this could be, there really isn't any rhythm or reason of when it comes on or doesn't. If the module does not like the signal it receives in return it can discontinue power to ask the motor to run. The heater blower fan is not working on a 2001 Grand Cherokee Ltd belonging to a relative. Power may not be making its way through to the fan. Blower motor has no power Posted by AKUMA1975, Mar 5, 2012. Test the power on the blue and black and … When my Ac works it blows good cold air , but there are times that it doesn't want to come on , No air nothing. I expect it is a relay, but I cannot find where these are located. Mar 5, 2012 #1. If the unit has power and the gas does not come on, more than likely the ignitor failed. AKUMA1975 Probationary Member. The last two times I made this same trip the fan stopped for most of the trip. I replaced that fuse, but after that the interior blower fan wouldn't work. 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