Question about 2005 Dodge Caravan

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Takes too long to get heat in the cabin sometimes if you turn the heat knob.. temp left to right it heats faster is this controller a reostat type

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I don't think its a variable resistor or rheostat. I think its an actual I/O switch that controls smaller solenoids maybe up to three that divert air in places and open a door or close a door to the heater core that should be very hot. It may be a malfunctioning switch or a divert er solenoid or one of the solenoid could be broken because it is just plastic. The last thing i would check (not to be rude) is your coolant level a low level wont circulate your heater core making it quite cool.good luck hope this helps.

Posted on Apr 20, 2010

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1996 Honda accord cabin air control won't switch to full cold it's only warm air is it sticking in the air box or off track idk the knob won't turn all the way to cold either I force it and it clicks back...


the air control heat knob needs removing to determine if its the knob itself, this will just pull off, look at reverse of knod and look to see if the center locating pigot is worn "round" or broken , if this looks ok then the panel housing the knob controls will need removing and then check if the heat control wire is in place, if so trace this wire ,this is a bare steel control wire not an electrical wire, to the heater box lower dash behind the control panel and see if you can manually move the heat control flap this will look like two toothed semi circular cogs that inter lock , one may have jumped out of place try a little vaseline on the cogs to help lubricate the movement,this is just good practice, after all this i think you will have found the problem

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Temperature knobs won't change temperature Chevy Tahoe


You likely have a HVAC control head failure. The rear heater problem is likely a door actuator, the rear wiper is likely a open wire in the door jamb in the top. The gauges are likely a cluster failure.

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No heat when stopped for traffic


1-your thermostate is stuck open half way. thermostate is a simple device that made of enlarging metals when heat is applied. it suposed to be in close position to allow engine heat up, when specified temp reached it opens and let it flow and radiator tries to keep coolant cool.when it is broken it stucks or it acts slow or it wont acts at all. in your situation it is stuck open half way. it allows enough water to be heated but flow is limited to heat cabin heater.

2-if there are cabin heater selenoid/selenoids for two different temperature for cabin left and right, on some instance those selenoid valves to adjust cabin heater stuck open or closed like thermostate acts on first case. so heat is not enough to heat up cabin heater.

Nov 18, 2011 | 2005 Chrysler Sebring Conv

1 Answer

I have a 2004 kia optima and i have no heat. checked all the fuses and all good but still dosen't blow heat.


do you mean the heater isnt giving hot air or the blower motor doesnt work if you have no heat check prestone level in rad possible thermostat not working rad cap leaking pressure inside car vent not closing or opening is this a fully electric heater control or manual type with cables what i mean do you push a button forr heat or turn a knob on the heater if it is a knob its manual type and the cables run to your feet on the passenger side sometimes they pop out and the control stays at the last position or if push button type electric the heater control burns you have to take the control off to see if not burnt but for know check the traps are closing and opening

Jan 07, 2011 | 2004 Kia Optima

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When moving temp control knob to right for heat,makes something makes clicking sound and no heat .


Sounds like your Heater Control cable has given way. When you turn the knob, its supposed to pull a cable that operates the heater control valve. Either the heater control valve is bad, or the cable needs to be repaired or replaced.

theroadisalover

Jan 06, 2011 | 2003 Kia Sedona

2 Answers

Cabin blower runs constantly, even if car is off. 1999 saab 9-3 se


the motor has a permanant feed the reostat is controled by the earth via the switch ,something has packed up between the switch and the reostat

Mar 11, 2010 | 2004 Saab 9-3

2 Answers

2005 RX8 heater is blowing cold air. Fluids are topped up.


You need to repair the heater core with a soldering gun.

If you do not have heat, or only have heat, IMHO it is most likey the AC/heater control unit. This is the part which has the AC/heat control buttons and knobs.

Easy Diagnosis:
The easiest way to verify this is to turn on the radio, press and hold the power on/off button and press and hold the scan-up button for a second (full second). The word "A/C TEMP" should appear on the left of the display and a number from 0 to 16 on the right. I suspect yours will have the number 0 (or 16 if heating only problem) displayed no matter where you turn the temperature control knob. If this is the case you could turn the temp. knob to full heat and see if it goes to 16 after pushing down or to the right on the knob.
In a working system, the number moves evenly in increments of 1, from 0 to 16 as you turn the temperature knob.

Easy Fix:
I was able to take mine out and solder 3 loose connections to fix it.

The beginning steps are the same as for any radio removal procedure and check for loose connections.

Dec 14, 2009 | 2005 Mazda RX-8

2 Answers

A/C will suddenly send out heat. Fiddling with knobs seems to help. What's wrong?


You have a broken wire connection between the temperature control knob and the circuit board behind the center dash console. Vibration causes the failure and once the control knob gets loose the solder connection fails.

For someone that knows how to remove the dash unit and can re-solder a couple of new wires this fix should take no more than 1 hour. Make sure that you apply loctite to the heat control knob spindle nut when you re-assemble it.

The dealer quoted me 750 dollars to fix this issue and I found out that it's a common failure for this year. I fixed mine virtually for free but it took some tools and about an hour of my time.

Jun 02, 2009 | 2005 Toyota Highlander

2 Answers

Hot air forced into cabin while driving 92 saab 900


the air distribution switch controls the air distribution and the fan, distribution switch in the 0 (straight down position) will be off. Car movement forces air into teh body, but with teh fan off there will be no air when the car stops. Does the fan run when the distribution switch is in any other position? it should respond to the speed settings of the fan switch.

There is a vacuum bottle accumulator that assists the distribution switch, sometimes this gets disconnected and the switch settings don't work.

Do you hear any noises if you turn the distribution knob while the car is running? suction noises, or flaps opening?

If not, then you likely have a vacuum problem (check for a white bottle in left front wheel housing, except convertible -> under the spare wheel, tank should have one or two vacuum lines connected to it (one for convertible). A disconnected or leaky line is the most likely cause.

Possible other causes are faulty air distribution switch; burned out fan motor; inoperative vacuum solenoid motors controlling air distribution flaps.

But check the vacuum accumulator first, if under the spare wheel, the lines are easily dislodged.

May 30, 2009 | 1993 Saab 900

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