Question about 2003 Volkswagen Jetta TDI

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2003 vw jetta tdi temp gauge was going up to 120. Replaced thermostat now no flow to heater core

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Bleed the coolant system.

Posted on May 16, 2010

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Posted on Jan 02, 2017

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1 Answer

Jetta 4 2.3 v5 heater does not work,only blows cold air


Hi, if the temperature gauge read zero then the thermostat is gone.
If it's just no heat and the gauge on the dash is reading normal coolant temperature then it may be the Coolant Temperature Sensor. If the heater core was gone there should be a leak inside the car somewhere. Hope this helps

May 31, 2014 | 2000 Volkswagen Jetta TDI

1 Answer

Temp Sensor in my VW 2002 Jetta was replaced due to a Check Engine light and a code noting this needed to be done. Once complete my car began heating up. Coolant light came on and my temp gauge pegged in...


If your radiator fans are not running at all than I would check over the wires your disconnected when rpolacing the temp sensor. Make sure they are fully connected. That would be the first thing I would check.

Good Luck

Aug 01, 2011 | 2002 Volkswagen Jetta TDI

1 Answer

Heater donot get hot whil running


It could be a plugged heater core or heater control problem. I assume the blower is working, but the air is cold. The first thing to check is the coolant level, make sure there is coolant in the resivoir. Next see if the temerature gauge reaches the normal operating temperature range. If the gauge reads cold most of the time, it would tell you that the thermsotat is faulty and not allowing the engine to reach full operating temperature. If your car doesn't have a temp gauge, the blue cold engine light might stay on for an extended period of time. The thermostat is supposed to not allow coolant flow in the radiator until the engine reaches operating temperature. If you drive the car for a couple of minutes, from cold start, the radiator or upper hose should be cool until the engine reaches operating temp.

Mar 15, 2011 | 2003 Volkswagen Beetle TDI

2 Answers

2003 VW JETTA TDI TEMP GAUGE WAS GOING UP TO 120. REPLACED THERMOSTAT NOW NO FLOW TO HEATER CORE


it is more than likely airlocked bleed air from system or open heater core pipe make sure heater core is full

Mar 26, 2010 | 2003 Volkswagen Jetta TDI

1 Answer

2003 Jetta temp guage not working


Possible the Thermo sensor faulty.
Need more info...Any dash lights on...Is interior heater working correctly...Is coolant level ok...Is Temp gauge moving at all

John

Nov 16, 2009 | 2003 Volkswagen Jetta TDI

1 Answer

2002 VW Jetta Radiator Problem


Many older cars (yours is 10 years old ) just needs the raditor changed. Flush the heater and the motor good as you'll stopp the new raditor. The owers manual says flush every year some owners never do it !

Aug 21, 2009 | 2003 Volkswagen Jetta TDI

1 Answer

96 Golf reads hot after replacing Coolant-engine feels cool.


Had similar problem on my 2000 cabrio---hit the dashboard lightly above the temp gauge and it dropped to normal reading---the temp gauge spring was oversprung from the previous overheat problem I had---as long as the engine is cool --then so are you

Jun 04, 2009 | 2002 Volkswagen Jetta TDI

1 Answer

I have a 2003 VW jetta tdi


You've lost engine coolant somewhere, and need to fill the engine back up with the VW special G12 coolant.

Then find the leak, which will be in one or more of the following places -
Water hoses to heater core, including any other coolant carrying hoses in the engine compartment
Radiator hoses
Plastic manifold bolted to side of engine which is known to leak (have replaced on an '01 VW Beetle, and an '02 Jetta, both members of our family in the past few years.).
Overflow reservoir cracked
Radiator leak.

Reply back what you find. If the engine got too hot, you may need to have the thermostat replaced.


Feb 03, 2009 | 2003 Volkswagen Jetta TDI

2 Answers

Heater not working


vacuum to blend doors cancels when engine uses it upon acceleration... there is a check valve that could have failed there at vacuum lines to blend doors .good luck

Jan 14, 2009 | 2000 Volkswagen Jetta TDI

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