Question about 2002 Volkswagen Passat

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I have a 2002 v passat with no heat both heater hoses are hot eng temp @ 195 blend door seems to be working good

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Are both hoses going into the heater core hot?

Posted on Dec 05, 2009

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Posted on Jan 02, 2017

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The A/C pump starts when i move heater controls to defrost or mix


Great question dustin but the A/C is suppose to come on in defrost or mix mode- this is floor & defrost. Does not seem to make sense does it. One of the things the a/c does is remove the moisture from the air. You need warm DRY air to remove the moisture from the windows. An automotive H.V.A.C. ( Heating,Ventilation,Air conditioning) first forces air thru the a/c evaporator core then thru the heater core and out the selected vent. If you only want a/c a blend door will by-pass the heater core which is controlled by a hot/cold knob or digital temp cotrol on the dash. Now back to the cold air problem- assuming the basics are all ok- Coolant is full, Engine gets up to proper operating temp-around 195 degrees- upper radiator should be hot. Both heater hoses should be hot. If thats all OK the blend door might not be working. It is controlled by an electric motor called a Blend Door Actuator which are prone to fail. I have replaced many on ford vehicles. Hope this helps

Nov 26, 2013 | 2006 Ford F-250 Super Duty

1 Answer

My heat or defraust works on my 89 Cadi Devile just continues to blow cold air


Is your eng get warm if you eng is not heating up it can be a thremaste stuck open if the eng is heating up ck the heater hoses if the top hose is hot and the bottom is cold the heater core is pluged if the two are hot and warm the blend door is not working

Mar 06, 2013 | Cadillac DeVille Cars & Trucks

1 Answer

Will not heat up put a new thermostat in it is a 195 is there one higher to put in I drove 70 miles and the onlyhthing I got was warm airiI it is a 1994 jeep grand Cherokee


Well the recommended temp is 195 degrees which is the hottest you can get. Anything over 160 degrees will give you heat inside the truck.
You would need to know if the radiator is full of coolant, the heater hoses are getting hot, and the blend doors under the dash are working.

Jan 24, 2013 | Cars & Trucks

1 Answer

Dakota v6 has new heater core, thermostate, can hear blend door opening, and upper hose and both core hoses are hot but still no heat. dummy temp gauge looks like it might be reaching 160 range instead of...


160 degrees should be hot enough to get some heat.
You could check the engine temp with a scanner to confirm.
I would double check the blend doors, and the temp of the coolant in and out of the heater core. I use an inferred temp gun.

Oct 08, 2012 | 1995 Dodge Dakota

1 Answer

2002, VW Passat, 2.8 Liter, 30V, ATQ No heat, Climatronic System. Control module is good, Fluid levels are good, thermostat good. Can't find the Heater Control Valve, need the location for this valve???


No heater valve on this car. Heat is controlled with temperature doors that blend the ac and heat to give you the desired temp. The core is probably clogged. It usually does not clog until the coolant wont pass through it but the fins get cruddy and don't transfer heat to you. Try taking the hoses off the core and blast water and air through it then retry the heat.

Nov 18, 2010 | 2002 Volkswagen Passat

1 Answer

I have a 2002 mercury sable that heater will not get hot. last year replaced a stopped up heater core and it was fine all winter. this year replaced thermastat and blend air actuator. its warm but not...


Since your blower is working and it is a heat issue,thats where we'll start,First thing is have you checked the coolant level in the radiator when engine is cold,make sure it is filled to top,next verify you have coolant in reserve ,Start your van and get it up to normal operation temperature,If your heat gauge on the dash works correctly it should be 190 degrees,Now lift the hood and locate the two heater hoses going into the heater assembly at the fire wall,Both hoses should be hot to hold on to,if both are hot and no heat inside your problem will be the blend air door in heater assembly.
if neither hose is that hot you need to replace the thermostat in the engine to get it up to 195 degrees.
if one hose is hot and one is luke warm then the heater core is blocked and to blame. hope this helps you.

Jan 05, 2010 | 2002 Mercury Sable

2 Answers

No heat from my heater. Fluid levels are good, motor seems slow to heat ( at least on the guage)


Everyone jumps to the thermostat because its a good place to start. If, when the engine is truly at op temp, the upper and lower radiator hoses are both hot, its not the thermostat. If you have the temp control to hot and both heater core hoses are hot, its not the valve or control. Check the blend door actuator (behind the glove box), and then the blend door itself as it may be broken (its plastic) and not closing off the cold air.

Nov 07, 2009 | 1996 Ford F250 Crew Cab

2 Answers

Heat does not work. coolant level ok and temp is ok


Might try checking the temp blend door operation or the temp blend door actuator. If all good there perhaps the control head itself is faulty.

Oct 08, 2009 | 2000 Jeep Grand Cherokee

2 Answers

No heat in vehicle . both heater hoses are hot


Seems like your mode door actuator for hot cold has failed. Temp Mode Door Actuator needs replaced

Mar 05, 2009 | 2005 Chevrolet Equinox

2 Answers

1994 pontiac firebird HAS NO HEAT


Okay. warm up vehicle, get radiator hoses hot.  Turn on heater, fan on low.  Grip both rubber heater hoses close to the firewall, from the engine compartment side.  They should be too hot to hold for long.  If they are not hot, then you have a lack of coolant circulation to the heater hoses.  If they are hot then access heater core, behind glove box area.  Blend door which moves as you chose HOT or Cold, should be cable controlled, move the controls and be sure the door is actually moving. Keep me posted 

Dec 17, 2008 | 1994 Pontiac Firebird

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