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Old 02-28-2013, 12:14 PM   #1
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Cockpit Heat

I purchased a 2004 MDTS in December and the heat output from the dash heater is very low. Is this normal, or any suggestions to improve the heat output to the cockpit area?
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Old 02-28-2013, 04:08 PM   #2
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It's a common problem across many makes of pushers. Figure you have 40'+ of un-insulated heater hose running from the rear of the coach, and an engine that runs at 180F instead of 210+ like a gasser. Put those two together and the heat coming out of the heater core is minimal at best.

What I did was investigate thoroughly for air leaks coming through the "firewall" found quite a few and sealed them with expanding foam. This helped quite a bit with the chill in front. I may or may not insulate what hose I can reach but if very cold out I just run my furnace in addition to the heat.
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Old 02-28-2013, 04:47 PM   #3
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thanks very much
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Old 02-28-2013, 05:42 PM   #4
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One trick to make the cockpit area warmer, or cooler in summer, is to install a curtain behind the seats so that you are not trying to heat or cool the whole coach.
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Old 02-28-2013, 06:51 PM   #5
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Do a search on the forum....need to make sure control valve is opening and coolant is being circulated. Might also try putting dash selector on max A/C and turning heat buttom to hot. This setting heats the inside air only and seems to help overall air flow thru the fan. This setting does run the A/C compressor so if you are going to be in cold weather for an extended period, you can disconnect the A/C compressor clutch at the compressor [single wire connection].
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Old 03-01-2013, 02:09 PM   #6
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Mine puts out plenty of heat, even when driving in 30 degree temps recently over Donner Summit at night. I had to put the fan on 3rd from low setting (mine has 4 steps) for plenty of hot air, but it kept me warm enough to drive w/out any other heat.

Check control valve function, check heater core box to see it something built a nest in there, check heater core for plugged condition, check damper to see its closing (not 50% outside cold air straight thru), etc.
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