blower

[passat tdi130]

hi all i have just noticed on a long run motorway speed's my heater is cold at 24 25 26 27 degrees then the hi setting is hot also the temp gauge is down about a couple of needles width

any idea's to the prob..? could this be thermostat ..?

p.s. i replaced the temp sender about a month ago with genuine part

[passat tdi130]

anyone..?

[scotty33]

Quite likely to be the thermostat, mine taking a long time to warm up, I did not notice that the heater was inefficient, but probably was. Maybe you also have an issue with the 'thermostat' within the cc head?

you can see the coolant temp in measuring blocks using Vag com. Mine was only reaching approx 75 deg most of the time yet showing nearly 90 on the gauge. New stat was approx £20 from VW

[passat tdi130]

mine warms up pretty quick to be honest heater wise..!

but just noticed as i said the temp gauge dropping a touch on a long run and heater does not really blow warm/hot till i get to the highest setting..?

any further help on this before i change stat..!!!!

[scotty33]

There is a way of interrogating the cc head for faults without any leads/software, I have lost the link I had, but may be worth a search and trying this before you do the stat.

[caldirun]

hi all i have just noticed on a long run motorway speed's my heater is cold at 24 25 26 27 degrees then the hi setting is hot also the temp gauge is down about a couple of needles width

any idea's to the prob..? could this be thermostat ..?

p.s. i replaced the temp sender about a month ago with genuine part

Could be quite normal if the cabin temp is around 26 then only hi will blow hot, its computer controlled.

[scotty33]

found info:

VW Climatronic (by Hella) Self-Diagnostics
Original Author: Roger, Location: Greater Frankfurt am Main Posted on: 09-09-2004 Original Title: Eigendiagnose an der VW Climatronic von Hella
Translation by: Nate (AKA VWAffe), 16-08-2008
Here are a few instructions on how to decipher useful information from the VW Climatronic control panel. Especially attractive is the fact that you do not need any sort of diagnosis equipment, and can read out one value or the other while stopped at a light, for example.
The description of reading error codes, performing the control surface test, and onboard-diagnosis is limited to the Hella control unit, as pictured below. This unit is found in the Golf IV [ed: in Europe] and in the Passat 3B/3BG. Externally identical control units from VDO were also used in some of the same cars, which have the same pinouts, but whose Self-diagnosis channels are assigned differently. User beware! Reading the Internal Error Memory: Ignition ON. To activate the readout: Press and hold the „ECON“ and „Recirculate“ buttons simultaneuously for about 2 seconds. Any error codes present will now be displayed. To scroll to the next error code, press the „Warmer“ button. When all codes have been displayed, „000“ is displayed.
If there are no errors present, „444“ is displayed.
To clear the error codes: After the last code is displayed, (i.e. after „000“ is displayed), press and hold „ECON“ for at least 2 seconds. „444“ will be displayed as confirmation that there are no more codes present.
To exit the Internal Error Memory Mode: briefly press the „ECON“ button.
List of Possible Error Codes: (Error Code / Error Location / Error Type) FFFF Control Unit 0x25 0119 Vehicle Speed Sensor 0x25 0214 Supply Voltage 0x06, 0x07 021A Reference Votlage 0x06, 0x07 0510 Temperature Sensor – Dash Vent (1296) 0x1d, 0x1e 0511 Temperature Sensor – Footwell Vent (1297) 0x1d, 0x1e 030B Outside Temperature Sensor – Front Bumper 0x1d, 0x1e 0313 Temperature Sensor – Fresh Air Inlet 0x1d, 0x1e 0332 Temperature Sensor – Evaporator 0x1d, 0x1e 0333 Refrigerant Pressure Sensor 0318 Air Conditioner Pressure Switch 0x23 031D Photosensor for Sunlight Intensity 0x1d, 0x1e 0382 Compressor Valve 04F7 Temperature Flap Servo Motor 0x25 04F8 Central Flap Servo Motor 0x25 04F9 Fresh Air Blower 0x25 04FA Recirculation Flap Servo Motor 0x25 025B Footwell/Defrost Flap Servo Motor 0x25 04B6 Standing Time Signal 0x25 0538 CAN-Bus 0513 Gateway 053D Kombi 04AE Gateway Database Version 0414 Control Unit Not Coded 0x23 043F Basic Settings Not Accomplished 0x23 Actuator Test All components of the Climatonic system are exercised during this test.
Requirements: Ignition off, Motor off, Vehicle stopped, Battery voltage 15 < 15.5 V.
To begin the self-test routine, simultaneously press and hold „ECON“ and „Recirculate“ then turn on the iginition (do not start engine) while keeping the buttons pressed, and continue pressig the buttons for about 2 seconds more. All LCD segments in the Climatronic display will now illuminate.
During the following automatic actuator test (duration ~30 seconds), all actuators will be exercised in a serial fashion. In addition, all control unit inputs (Sensors, Motors, Servos, etc) will be checked that can be checked with th motor off. During the test all

I can E mail the pdf which reads better if you like, PM me?

[passat tdi130]

Could be quite normal if the cabin temp is around 26 then only hi will blow hot, its computer controlled.

hmmm thats sounds logical but i have never noticed that before..!!