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Old 02-28-2013, 11:14 AM   #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?

Dan, MJ and Tucker Dobbins
2004 Alpine 40 MDTS
2013 Honda CRV
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Old 02-28-2013, 03:08 PM   #2
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Location: Durango CO
Posts: 580
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.

The above post is just my experience/opinion which is worth exactly what you paid for it.

'05 Lance 845/'06 F-250 or '99 Alpine 36SDS Usually towing an '01 Wrangler locked on 35"s or moderate '98 Cherokee on 33"s (rear locker only)
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Old 02-28-2013, 03:47 PM   #3
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thanks very much
Dan, MJ and Tucker Dobbins
2004 Alpine 40 MDTS
2013 Honda CRV
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Old 02-28-2013, 04:42 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.
John and Mary Knight
2015 Ventana 4311, 2015 Cadillac SRX
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Old 02-28-2013, 05:51 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].
Old Scout
2003 40' MDTS
Garden Ridge, Texas
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Old 03-01-2013, 01:09 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.

Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project
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