civicej897

hello all, i have a 97 civic ex recently my heater has been turining off and on. Then it just stop working. its hooked by running a wire from the harness to the fuse box with on/off switch i bought it like this the actual switch on the heater unit doesnt work so it was always running like it was on 4. So i checked the fuse its not blown now im stumped on what else to look for.Please help i live in new york and its getting cold.

civicej897

None can help, well I replaced the fuse, relay, resistor. Can it be my control unit or blower?

axis11

Did you mean the blower motor is turning on and off? When it blows, you get hot air? Points to check: Blower motor, resistor pack, underhood relay, climate control panel.

oversteer_ms

Its most likely the blower motor itself.

Ill look up the flow chart tomorrow.

Jo_JDM

You might have blown out the motor since you jumped the fuse...

civicej897

Yes the heater control switch is broken so what it looks.like is the blower was jump with and on/ off switch and yea it started to go off on it's own and kick back on and now just doesn't turn on at all. Resistor, relay, engine bay fuse have been replaced still nothing blowing basically when I turn the switch on nothing happens no hot air or cold just doesn't blow. Thank you for the replies guys I'll replace the blower but if anything else yall can think of that I can check would be helpful. Thanks again.

axis11

If you want the blower and a/c to run like as it should, replace/fix the control panel issue first and restore the wirings like oem. Test the motor with direct 12v supply.

civicej897

Ok now can i change the switch itself or or the whole heater/a/c control unit?

axis11

The control panel comes in one piece. R & R.

civicej897

Hello all again im back so i checked the blower with 12v and it started spinning. So what if the reisitor is blown will the blower still turn on? Now if its not the resistor can it be the xontrol unit.

civicej897

Hello all again im back so i checked the blower with 12v and it started spinning. So what if the reisitor is blown will the blower still turn on? Now if its not the resistor can it be the xontrol unit.

civicej897

Thanks for.the help everyone I found the problem to be the control speed switch, by the way is replaceable. Thanks again all.

los94

did u have to end up replacing the little slider **** ? mine broke off because it wont move from the middle but the ac and heater work im stuck on how to replace it i got all the parts i need but im not sure on how to take it off