I turn on my heater, and there is nothing. The lights light up, but no air blows. no defrost, heater, or by your feet. Not even the fan blows. Any ideas? This summer, the air worked, but then it quit too. I can turn the knob all the way up, and it just seems "dead". Is it possible i blew a fuse? or any other ideas?
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check for loose wiring by heater blower motor if that dont work,take the blower motor out and check it to see if its any good by using two wires connect them and check blower motor on battery posts if it turns then its not that
have 2002 altima,blower works no heat at idle and very little heat when accelerating.I changed carbon cabin filter,made sure little gear under dash to temp knob wasnt broken,flushed and bled system.Nothing worked so checked hoses to heater core and found inlet hose was hot,outlet hose was not.So investigated this problem and came to conclusion heater core was clogged.An easy way to check is to get car to normal running temp. put on heater and blowers at full.Go under dash on passenger side where counsel meets firewall,this is where heater core core inlet and outlet aluminum tubbing go through firewall,you will be able to feel both tubes one closest to you is outlet, so if this one is not hot and and other is your heater core is clogged.I detached both inlet and outlet hoses to heater core from water control valve.Then I blasted water with waterhose and nozzle set at jet,first through outlet hose to blow gunk out,then through inlet hose until water runs clear.Reatach hoses fill and bled system.heater works great nice and hot!
Sounds like you have a bad connection at the blower motor plug. Have you checked under the glove box where the blower motor is? Usually has a big plug with 2 heavy gauge wires. that might be melted or getting a bad connection. Try holding the plug to one side or wiggle it to see if turns off blower. If not, check your resistor that controls your fan speed, located near the fan on your a/c ducts. Usually has a plug with 4 0r 5 wires held up by 2 screws. The wires are heavy gauge as well
You could have a head gasket problem that will destroy your cat and 02 sensors. BUT without spending much cash reverse flush your heater core internally first. If this doesn't work I've seen little friends make nests inside the blower motor housing. Take out glove box then drop down blower housing. Vacuum and blow out housing and reach in and clean externally the heater core. Both jobs will take inexperienced folk 4 hours.If this doesn't fix the be prepared to open up your wallet.
may be a fuse, switch or blower. I would check all my fuses inside as well as under my hood, if they are all good, then I would check my switch, label all wires before disassembling, if switch checks out good then it will have to be the motor blower itself. Hope this helps Tim
its very possible, the blower motor is under the passenger side of the dash and next time its hanging up and running slowly find the lump sticking down and give it a a light to medium strength hit with a rubber hammer or something comparable. if it picks up and runs right you're looking at a bad blower motor if not it gets pretty complicated from there and you may need to seek a local mechanic.
appears we have an Air lock scenario and you will need to perform a
the vehicle on level ground, when cold remove coolant filler cap,
start engine and leave to idle, turn heater on full and blower to
max. When engine reaches operating temperature watch and listen near
coolant filler, keep clear as gurgling and hopefully a boil over
should occur. Top up with very warm coolant and wait as it may do it
for heat inside vehicle if warm replace coolant cap but keep an eye
on temperature gauge as the ~Air lock may have moved on from heater
matrix/core so proceedure needs to be carried out again from COLD.
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boy, that sound like a major circuit to cause all that. either a main fuse under the hood or a main circuit wiring harness connector. there are no unfused circuits that could indicate a short unless there has been past fuse blowing problems