This is the solution if your car sometimes has unexplained water on the passengers side floor after it rains and the Blower is working erratic.The solution lies under the large black bezel/cover below your windshield wipers. Under this bezel on the passengers side is a piece of weather stripping that has fallen off. You will see it right away. If you fix this and replace your blower motor and resistor your HVAC will work correctly again. I spent a year trying to figure this out.
Just remove the bezel and check the weather strip. You will be able to see where it was by the discoloration. It falls off by poor design and allows water to seep into your blower motor shorting out the resistor and if left unchecked will smoke the blower motor also. You want to add some silicon sealant and replace the weather strip to it's original position. As far as the blower motor and resistor it is not all that difficult to replace. You will have to lie on your back on the passengers side to get at it. It's very uncomfortable.
Mine does the same thing. The blower never worked on 1 but always on 2. A few weeks ago, It started only working on 5!! I haven't taken it anywhere, but my dad (who is very knowledgable about cars) says it's probably the switch in the panel. Hope this helps!
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This is a generic answer as I don't know your car. My Ford has 2 fans. They only come on when the engine gets hot, but when I turn the airconditioner on, they start straight away and turn off a few seconds after turning the car off. Is your air conditioner turned on? It may be the same.
It sound like the blower wheel of the blower motor is rubbing the inside of the housing (the smoke). Sounds like the blower wheel rubbing may have burned the inner plastic housing or has come off of the motor shaft inside. Take the blower motor and wheel back out and inspect everything closely I think you will find the problem.
IF you replaced the heater fan motor recently then that should not be the issue. However it could be the control or the motor speed resistor in the plenum. Look at the location for the fan, there should be a set of wires that connect to a plug that appears to have screws in the edges and it attaches into the plenum. This holds the resistor in place. They can and do go bad.
HEATING AND AIR CONDITIONING
HONDA CIVIC 2001 - 2005
How to retrieve DTC:
The heater control panel has self-diagnosis function. To run the self-diagnosis function, do the following:
1.Turn the blower fan OFF.
2.Press and hold the recirculation control switch and the rear window defogger switch down.
3.Turn the ignition switch ON (ll).
4.Release both switches. The recirculation indicator and the rear window defogger indicators come on. The recirculation indicator goes off 3 seconds later and the A/C indicator comes on, then the self-diagnosis will begin. About 10 seconds later, the self-diagnosis will finish and the A/C indicator goes off.
- If any trouble is found, the recirculation indicator blinks the diagnostic trouble code (DTC) to indicate a faulty circuit or component.
- If the system is ok, the recirculation indicator stays off.
DTC TROUBLESHOOTING INDEX
DTC (Recirculation indication blinks) Detection Item Page
7An open in the air mix control motor circuit.21 - 16
8A short in the air mix control motor circuit.21 - 16
9A problem in the air mix control linkage, door, or motor.21 - 17
10An open or short in the mode control motor circuit.21 - 18
11A problem in the mode control linkage, doors, or motor.21 -19
12A problem in the blower motor circuit.21 - 20
13A problem in the EEPROM in the heater control panel;
(THE CONTROL PANEL MUST BE REPLACED).21 - 38
14An open in the evaporator temperature sensor circuit.21 - 23
15A short in the evaporator temperature sensor circuit.21 - 24
- In case of multiple problems, the recirculation indicator will indicate only the DTC with the least number of blinks.
- In case of an intermittent failure, the heater control panel will store the DTC until the ignition is turned off.
REPLACE THERMOSTAT.IF ALREADY DONE.CHECK HEATER BLOWER MOTOR SEE IF POWER GOING TO HEATER BLOWER MOTOR.IF YES BLOWER MOTOR BAD.IF NO POWER GOING TO BLOWER MOTOR CHECK AC AND HEATER CONTROL FUSE AND CHECK BLOWER MOTOR FUSE AND RELAY IF ALL IS GOOD CHECK SEE IF POWER GOING TO AC AND HEATER CONTROL SWITCH IF YES THE AC AND HEATER CONTROL SWITCH COULD BE BAD.
There are two components between the heater/AC contol panel/module and the blower motor; a blower resistor and a High blower relay.The problem sounds like a connection issue(a wire is loose) or the relay is going bad.Have the voltage tested at the blower itself,at the relay and at the control panel.Do this when the blower is not working.Wherever there is no voltage when you turn on the blower,that component is the problem
Most probably a motor going bad but it could also be the switch, the blower resistor or a bad connection. The easiest way I can tell you to isolate the problem is check for voltage a the blower motor when it is on but doesn't blow. If you have voltage all the way to the blower, then that is your problem. Hope this helps.