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Old 01-16-2010, 03:01 PM   #1
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Engine Heat????

I know it is winter time, and yes it can be cold outside. But, while driving I shouldn't have to wear a heavy coat with gloves. With the temp control at maxium and the selection going between upper and lower vents and the fan at full speed, I should have more warm air coming out of these vents.

While traveling across the country on I40 last week, we could not get much warm air coming out of the vents. After a couple of hours of being cold and we stop for a break, and with the engine running, it then puts warmer air out of the vents, and it stayes warm after that. Now, sometimes after some driving, that nice warm air starts to cool down somewhat. Not as bad as it is first thing in the morning. I do let the engine warm up in the morning.

I know that the engine heater won't warm up the coach, but it should warm the front up somewhat. After I turn the front gas heater on, it helps, but, I shouldn't have to use every heating source to keep warm.

Hope someone out there has some clue.
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Old 01-16-2010, 03:34 PM   #2
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I have the same issue with my Phaeton. In very cold weather I have to run the furnaces while driving. Diesel engines don't run as hot as gasoline engines and won't put out as much dash heat. My Ford diesel pickup doesn't put out as much heat as my gasoline powered car.
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Old 01-16-2010, 04:24 PM   #3
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My 350hp Cummins ISC does put out enough heat to at least have warm air at the vents regardless of outside temp. But to keep any real comfort, in cold weather we run the generator so we can run the heat pumps, or in 30's or below we run the LP furnace.
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Old 01-17-2010, 12:52 AM   #4
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It makes a difference in the dash heating if you make sure the little A/C button is off on the bottom of the control panel.
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Old 01-17-2010, 04:28 AM   #5
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i always thought it was the water cooling off on its long trip from the back to the front.
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Old 01-17-2010, 09:15 PM   #6
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When in the heat mode make sure that you have the outside air damper closed. On mine it is the control switch that shows air moving in a circle. With this damper "off", or closed, no outside air is introduced into your heater air stream and you are are heating recirculated air from the coach interior only. It does help some, but not dramatically.
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Old 01-24-2010, 09:03 AM   #7
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Also check for air leaks around the firewall, several have complained about finding air leaks near where the dash connect to the firewall and several open holes in it as well. Check over at TiffinRVNetwork
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