Heater blower not working
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Heater blower not working
Hello everyone,
I'm working on a 98 Civic EX and blower stopped working suddenly. I was doing a coolant flush and had the heat on max. Next day when I started it up there was no air blowing.
I did the following:
- tested blower motor directly and it works
- replaced resistor, but it didn't make difference
- checked (and replaced) the fuse under dash, nothing
- replaced relay under the hood, nothing
Last night I tried it again randomly and it worked until I turned off the car. When i turned it back on it wasn't working any more.
Any suggestions what else to check?
I'm working on a 98 Civic EX and blower stopped working suddenly. I was doing a coolant flush and had the heat on max. Next day when I started it up there was no air blowing.
I did the following:
- tested blower motor directly and it works
- replaced resistor, but it didn't make difference
- checked (and replaced) the fuse under dash, nothing
- replaced relay under the hood, nothing
Last night I tried it again randomly and it worked until I turned off the car. When i turned it back on it wasn't working any more.
Any suggestions what else to check?
#4
Re: Heater blower not working
The problem is intermittent, so you probably haven't actually ruled out the blower motor with your test. You may want to redo that test multiple times.
Also check whether the hood and dash fuses for the blower motor are loose. You can gently and slightly twist the prongs to tighten.
Another possibility is the switch.
Also check whether the hood and dash fuses for the blower motor are loose. You can gently and slightly twist the prongs to tighten.
Another possibility is the switch.
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Re: Heater blower not working
The problem is intermittent, so you probably haven't actually ruled out the blower motor with your test. You may want to redo that test multiple times.
Also check whether the hood and dash fuses for the blower motor are loose. You can gently and slightly twist the prongs to tighten.
Another possibility is the switch.
Also check whether the hood and dash fuses for the blower motor are loose. You can gently and slightly twist the prongs to tighten.
Another possibility is the switch.
Also checked the fuses, made sure they're snug. Tried putting a different/spare fuse to test.
What switch are you referring to?
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#8
#10
Re: Heater blower not working
Two fuses are required for the blower motor because it is controlled by a relay. The relay requires two power and ground sources - for the relay switch and for the switch activator.
#13
Re: Heater blower not working
I had that problem with my 93 del sol. The blower would work initially but after running a while it would stop. If you immediately went under the hood and touched the blower relay you would burn your fingers as soon as you touched the relay. The relay is good it's just that it overheated because the blower is drawing too much current. When you go under the dash, remove the glove compartment and drop the blower motor. Look at the factory wire connection to the blower motor and you may see a lot of corrosion on the heavy gauge wire just behind the connector. This is a big short that happens after the motor runs a while and heats up the connection. I replace the blower motor with one from autozone and did a hard wire connection and got rid of the factory connector.
A lot of water/condensation collects in that area and settles right on that connector since it's a horizontal surface.
A lot of water/condensation collects in that area and settles right on that connector since it's a horizontal surface.
#15
Re: Heater blower not working
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Re: Heater blower not working
I had that problem with my 93 del sol. The blower would work initially but after running a while it would stop. If you immediately went under the hood and touched the blower relay you would burn your fingers as soon as you touched the relay. The relay is good it's just that it overheated because the blower is drawing too much current. When you go under the dash, remove the glove compartment and drop the blower motor. Look at the factory wire connection to the blower motor and you may see a lot of corrosion on the heavy gauge wire just behind the connector. This is a big short that happens after the motor runs a while and heats up the connection. I replace the blower motor with one from autozone and did a hard wire connection and got rid of the factory connector.
A lot of water/condensation collects in that area and settles right on that connector since it's a horizontal surface.
A lot of water/condensation collects in that area and settles right on that connector since it's a horizontal surface.
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Re: Heater blower not working
Figured I'll update this thread...
I found out what the problem was. Took out the fan switch and found out one of the pins in the back of it where wires connect was bent. Not sure how the hell the blower worked at all
I found out what the problem was. Took out the fan switch and found out one of the pins in the back of it where wires connect was bent. Not sure how the hell the blower worked at all
#18
Re: Heater blower not working
Thanks reporting the solution. Maybe it will help others that encounter a similar issue.
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