For some unknown reason my heater controls no longer work. The knob turns OK but the Temp doesn't change. The A/C is fine. The fan is fine. Just no heat. There are no warning lights or engine over heating. The Temp gauge goes from cold to normal when I first drive the car from cold starts. I've checked the cooling (radiator) water level in the container at the back near the fire wall and is OK.
Could this a common problem with 2.2 Vectra's ?
Could it be just blocked heater hose. ?
Is it electroniclly controlled.?
Help... I'm freezing in Melbourne's winter.
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Re: 2005 2.2 Holden Vectra Heater failure
Not sure of this model, but I'll do what I can.
Put simply, there is no hot water reaching your heater matrix.
This may be bacause -
A - It's blocked (sometimes caused by sediment or radweld products)
B - There's an airlock in the system.
C - the valve controlling flow is not working.
Check for rusty gunk in radiator. If yes, remove hoses to heater matrix and flush with a hosepipe. Reconnect and fill with antifreeze mix.
Listen for any gurgling going on. Remove (small) heater hose when engine has just started (so not hot)
(!!! coolant will come out!!!) but should remove airlock. By remove I mean loosten clip and wiggle it untill you get a trickle of coolant out of the side - then tighten clip again. - Aim for around a cupfull of loss.
3 - check that the control from the dash is actually moving a cable to open a water valve somewhere. Plactic parts break unfortunately.
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Disconnect upper and lower radiator hoses while vehicle running. Insert water hose on upper hose and let it run water until you no longer see coolant coming out. Remember to have heaters running to also clean heater core.
Once clear water comes out of lower hose, turn vehicle off and re-attach both hoses. Fill with proper coolant and run vehicle with heaters on. Take for a drive to remove any air from system. Then top off with coolant.
Jan 5, 2011 - Rather than scrapping, get the bottom hose fixed (Should be like ... If you do end up buying a new car, always buy japanese or commodore/falcon. ..... Holden vectra, If it is V6 vectra i can tell you right now it wont be the head gasket. .... broadband · Regional · Last century; International: New Zealand ISPs.
Hi Sharon, I'm glad to help. Your 2000 year doesn't have a motor for the temp door. It operated by a cable running from the control head to the temp door and you work it manually. If you can't control the temperature from hot to cold, sometimes the cable come off or breaks. Here how you can see the cable to see if its working. Remove the radio and right behind it you will see the cable attached to the door, while watching it move the temp lever from hot to cold and watch it. If it is moving then its most likely out of ajustment. If it is not moving, then you'll need a new cable. Just in case it is moving, I'm attaching the instruction on how to adjust it below. Hope this helps and have an awesome day Sharon!
TEMPERATURE CONTROL CABLE
Any time the heater-A/C control or the temperature control cable are removed and/or replaced, the following procedure must be performed.
The temperature control cable housing and core must be installed at both the heater-A/C control and the heater-A/C housing ends, and the heater-A/C control must be installed in the instrument panel. See Heater-A/C Control and Temperature Control Cable in the Removal and Installation section of this group for the procedures.
Rotate the temperature control knob on the heater-A/C control so that the knob pointer is in the 12 o'clock position.
Pull the temperature control knob straight out from the heater-A/C control base until the perimeter of the knob (not the knob pointer) protrudes about 6 millimeters (0.25 inch) from the face of the control base.
Rotate the temperature control knob to the 1 o'clock position. Push in on the knob slightly and continue rotating the knob to its full clockwise stop. The knob pointer should be aimed at a position about 8 millimeters (0.315 inch) beyond the end of the graduated red strobe temperature control graphic on the face of the heater-A/C control base. If the knob is not pointed to the correct position, go back to Step 2 and repeat the adjustment procedure.
Rotate the temperature control knob counterclockwise until the knob pointer is in the 12 o'clock position again.
Push the temperature control knob straight in towards the heater-A/C control base until the perimeter of the knob (not the knob pointer) is flush with the face of the heater-A/C control base.
Rotate the knob to its full clockwise stop again. The knob pointer should be aimed at the end of the graduated red strobe temperature control graphic on the face of the heater-A/C control base. If OK, go to Step 8. If not OK, go back to Step 2.
Rotate the knob to its full counterclockwise stop and release the knob. If the knob springs back from the counterclockwise stop, the self-adjuster clip that secures the temperature control cable to the blend-air door lever is improperly installed. See Temperature Control Cable in the Removal and Installation section of this group for the procedures. If the knob does not spring back, the temperature control cable adjustment is complete.
try locating the physical tap that connects your heater hoses to the interior of the car. note what position that tap is in before and after you turn up the temp dial inside. whatever connects the dial to the tap may be damaged.
if the tap itself turns then the heater side of the blower may be blocked.
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.
I'm glad I could help. I'm reposting the solution below in case anyone needs it in the future. Please be sure to rate it for me!
Pull the temperature knob off and verify the thin 12mm nut is installed
and tight behind it. I have seen several of these loosen up allowing
the knob to turn but intermittently have no effect on temperature.
the heater control valve is visible through the speaker cut-out; it's at the end of the plastic heater control rod, inside the car - not on the other side of the firewall! It's connected to the valve with a plastic "universal joint".
Check that the valve is actually being turned by the rod. The connection might not be good (pulled apart or broken), and or the valve might be stuck.