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Cold bum...seat heater quit!!!

2K views 2 replies 2 participants last post by  PowerslavePA 
#1 ·
Is repairing the seat heater a big or costly issue? The temp dropped 20 degrees over the past week, and TDI's take forever to warm up.
 
#2 ·
We've hit 11 degrees from the 50s, so that's more than a 20 degree drop,
and I don't use my seat heater. Mine heats up in about five minutes...
By the time I get a mile or so up the hill, heat is coming in just fine...

Most diesels take about five to ten minutes to hit about 150 degrees, the
exception are big-trucks, or larger diesel engines because they have larger
cooling systems. However, you have to remember, When Rudolph Diesel
designed the engine, he didn't include a cooling system, he didn't think it
would be necessary. Diesel engines are made of steel or cast iron, and
more of it to heat up -vs- gas engines. A cast iron block and beefier components
means more mass to warm up. Also, they have less waste heat which means less heat
transferred to engine coolant, and engine coolant warms the cabin. This is why
diesels come with seat heaters, but, I haven't had the need to use them. I have
no problem with waiting five minutes for heat...

The TDi manual says to start it up, and go, not to idle it to heat it up,
drive as you would. Mine heats up in five minutes or less, and it's been
in the teens temperature here, 11 the lowest.

I do notice temperature changes in heat coming in while driving. When I
reduce speeds, the air is hotter than when I am going 70+ on the
highway. I drive 450+ miles a day working, and not touching the dial
for the temp, the air coming in changes depending on how I am driving.

I also noticed a 5+MPG drop with the colder air, which is normal...
 
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