BEW heat expectations in the winter

burn_your_money

Veteran Member
Joined
Oct 16, 2012
Location
North Bay, ON
TDI
99 Beetle, 96 B4V, 05 Passat wagon
I've changed the thermostat twice on my dad's BEW and I don't think the heat has ever been right. I've not owned a BEW so I just want to confirm that this isn't normal before I spend $60 at the dealer for a thermostat.

Today was just a bit below freezing and I did not plug the car in. I started it up, drove 10 minutes on the highway and then 5 minutes in town. I had the heat selector turned to full heat but I had the blower fan off. The gauge never went to 90*c. I know the gauge isn't accurate and the computer manipulates it.

The first thermostat I put in was a cheaper brand (Accidentally ordered it)
The second (current) thermostat was a Mayle which I understand is OEM for the thermostats.

Next I planned on ordering one from the dealer.

All the other VW diesels I've owned would melt your face off if you left the heat on high. This BEW won't even melt the ice off the windshield.

Normal or no?
 

BobnOH

not-a-mechanic
Joined
May 29, 2004
Location
central Ohio
TDI
New Beetle 2003 manual
Not normal. Seems like you should have working thermostat action. I might think the heater core is plugged, but the car should still come up to normal. Low coolant level? Failing water pump? Normally that stuff leads to overheating. Just thinking out loud...................
At that temp, blocking the radiator would not help much.
 

JDSwan87

Black Swamp Thing
Joined
Feb 9, 2014
Location
Michigan near Toledo
TDI
2001 Jetta TDI, 5 speed Lagoon Blue Metallic(sold); 2005 Jetta TDI Wagon auto
What's the actual digital reading?

My BEW takes a solid 15min on the highway (20f outside) to hit 195f coolant. My 20 min drive to work of backroad driving only gets me to 170f (20f outside).

It was worse until I had Kirk change the tstat when he just did the TB job. I used to never crack 170f unless it was 80f outside.
 

burn_your_money

Veteran Member
Joined
Oct 16, 2012
Location
North Bay, ON
TDI
99 Beetle, 96 B4V, 05 Passat wagon
When I had VCDS hooked up to it, it seemed to hold around 70 (160) on the highway with the heat off. It would creep up to 90 if I sat and idled. My ALH heats up very fast. I can't remember exactly how fast though since it's been a few years since I've driven it in the winter.
 

Vince Waldon

Top Post Dawg
Joined
Apr 25, 2009
Location
Edmonton AB Canada
TDI
2001 ALH Jetta, 2005 BEW Wagon
A data point for you Tyler: my BEW and my ALH are pretty much identical in terms of warm-up time, defrost time, time on the highway to get to close to 90C ... here in Alberta's winter. The ALH has a t-stat that levels out at 89, the BEW at 91, but that's about the only difference I experience.

I do put the 3-piece winter fronts on both of them when we get a period of -20C or more and it helps get up to temp, noticeably.

That said, it did take me 3 t-stats... 3 OEM t-stats... before I was happy with the BEW. One was 5C too cold, the other bumped up against 95C in the summer on a regular basis and oscilated 5 degrees. My previous BEW was 89C, on the nose, summer/winter... so it can be done. :)
 

benshaw

Veteran Member
Joined
Jul 8, 2004
Location
51
TDI
a4 130pd bew
Unless you have equipment which has precise temperature readings, A stove test will only show it opens.
 
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