Why does my HVAC blower keep coming on and off?
Thus, cycling power to just the fan motor does not cure, even temporarily, the problem. But turn power off to the entire unit- then the fan stays off for some random amount of time. Usually measured in many hours, although not always. Very hard to troubleshoot like this.
Where is the fan blower motor on my AC?
All fuses good all relays good. The fan blower for your ac/heater is located under the glovebox. Take your hand and smack the fan blower motor a few times. That’s all it took for for mine to start working again. It’s been working for over 6 month’s now!
Why does my house fan not come on?
My house fan kinda behaves like that… when the blower motor is about to die, sometimes it won’t come on at all, other times it will work just fine, before finally dying, months later. What do you think of my diagnosis? Is the logic sound? mareakin July 6, 2016, 2:40am #2 Addendum: I suspect the blower motor for two other reasons:
Why does my car’s AC fan not come on?
If the blower starts working the blower motor requires replacement. The car is a 2007 Corolla. Bench testing the fan with a power source is a good strategy but this problem happens intermittently, so it can be tricky.
Why does my furnace blower fan not start?
If the furnace starts, the problem is either with the thermostat wire or thermostat. Replace the wire or thermostat to fix the problem. Your furnace blower fan not starting can have a few causes as you see here.
Why does my blower not come on when I start my truck?
Since then, every once in a while I notice that the fan doesn’t come on when I start the truck, or if it does it’s very weak, so I crank it to max, the fan blows noticeably, then I turn it down to a more reasonable setting.
What causes a fuse to blow on a blower motor?
If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current from a bad relay will blow the fuse and cut power in order to protect the system.
What causes a bad or failing blower motor relay?
Blown fuses. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay circuit fuse. If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current…