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03-25-2006, 08:59 AM
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#21
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Winnebago Camper
Join Date: May 2005
Posts: 16
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Thanks everyone for your input. I am getting hot air from the dash heater and the water gets hot at the faucets. I only get cold air from the floor vents when I throw the rocker switch on the dash. Question: "What could cause this?" It worked ok last year before I winterized the MH.
2005 Adventure 35U, 2002 CVR, Monroe RV shocks
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2005 Adventurer 35U, W22. Monroe RV shocks, 2002 CRV
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03-25-2006, 06:24 PM
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#22
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Winnebago Owner
Join Date: Oct 2003
Location: Solon, Ohio USA
Posts: 134
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Rigrunner,
Since your motoraid is working for the hot water heater, then you know it is getting hot water from the engine.
There is a "gate" or damper that opens in the heater duct when the coach heater fan is turned on. If I'm not running too fast, I can hear it close when I turn off the coach heater fan. Perhaps that gate or damper is stuck. I have a floor vent immediately behind the engine cover. If I take that off, I can reach into the duct towards the passenger side and move that damper. I'd check to see if it's stuck.
You can also call Winnebago Owner's Relations, and they will tell you how to check if there is water flowing through the heater coils of the Coach Heat. There may be a kink in a hose. I don't know if the water heater motoraid coil and the coach heat coil are in series or parallel.
Hope this helps.
W8RLM - Bob
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2006 Winnebago Journey, Model 39K, 2013 Dodge Dart
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03-26-2006, 03:17 PM
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#23
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Winnebago Camper
Join Date: May 2005
Posts: 16
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W8RLM-Bob,
Hey thanks for the suggestions. My duct is also right behind the engine cover so I'll check on the damper later this week when I go down where I have my MH stored.
Charlie
2005 35U, 2002 CRV, Monroe Shocks
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2005 Adventurer 35U, W22. Monroe RV shocks, 2002 CRV
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03-26-2006, 04:40 PM
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#24
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Winnebago Master
Join Date: Nov 2005
Posts: 1,080
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There was some discussion on this subject a while ago. As I recall the "Motoraide" system on a diesel coach is a little different than the one in a gas coach. The gas version has a "heater core" which will provide heat through the floor vent in addition to heating the water. As mentioned there is no temperature control for this unit only a fan switch on the dash.
The diesel version heats the water in the water heater only there is no additional heater core for coach heat.
It seems that I also recall someone mentioning that there is a panel under the coach behind the water heater on the gas coaches (35' and longer) that can be removed to access the heater core and blower fan. For the shorter gas coaches the water heater has to be removed for access.
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Hikerdogs
2013 Adventurer 32H
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04-12-2006, 11:49 AM
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#25
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Winnebago Camper
Join Date: Mar 2000
Location: Bella Vista, Arkansas
Posts: 14
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The fan motor went out on my coach heater(controlled by rocker arm on dash and described by others), had it replaced by Winnebago at the factory last week while having shower liner replaced. My extended warranty picked up the tab less my $50 ded. It is a tedius job to do it your self, crawling behind water heater etc....
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04-04-2007, 02:15 PM
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#26
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Winnebago Camper
Join Date: May 2005
Posts: 16
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Hi Everyone, This may sound stupid but my motoraid heater is working fine. I thought all this time that hot air is supposed to come out the register just behind the engine cover. Wrong, this is the cold air return. I have hot air coming out all the other registers. I'm passing this on so that others don't make the same mistake. As cold as it is the week you may be using yours. Cheers, Rigrunner
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2005 Adventurer 35U, W22. Monroe RV shocks, 2002 CRV
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04-04-2007, 03:19 PM
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#27
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Winnebago Owner
Join Date: Jul 2004
Posts: 150
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content"> I thought all this time that hot air is supposed to come out the register just behind the engine cover. Wrong, this is the cold air return </div></BLOCKQUOTE>
Is it possible that it's a cold air return for the coach heater only? If I recall correctly (haven't used it since last fall) I get hot air out of that register when furnace is on.
Page 5-3 2005 Adventurer Owner Manual refers to it as a "REAR" Coach Heater. To provide auxiliary heat to the "rear" of the vehicle, turn the coach heater fan switch to the desired speed.
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Bob Russo
Formerly had 07 Neptune 36PDQ, ISB 325, Allison 2500, Source Trailing Arms and Ride Enhancement Kit, Demco KarKaddy 460SS.
Currently no Motorhome
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04-05-2007, 07:04 AM
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#28
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Winnebago Camper
Join Date: Apr 2006
Location: Manitoba, Canada
Posts: 10
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On my 2000 Advent. 35U the cold air return for the Motoraid coach heat is located at the base of the folding table behind the co=pilots seat. Vent at rear of doghouse blows hot air. (something I have been accused of many times)
Brian
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2000 Adventurer 35U
Bilstein Shocks & Damper
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04-05-2007, 10:20 AM
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#29
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Winnebago Master
Join Date: Oct 2000
Location: North East Indiana
Posts: 762
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Heat comes out of my first register behind the motor cover, lots of it, as long as the fan is turned on. My cold air return is under the little table by the recliner.
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04-05-2007, 01:41 PM
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#30
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Winnie-Wise
Join Date: Nov 2002
Location: Crossville, TN USA
Posts: 397
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Anyone have to replace the fan for the motoraid heating? Mine is froze up. Not looking forward to crawling inside the cabinet to get it fixed. Been froze up for a couple of years now. Do not realy miss it.
When it did work. Heat came out of the first vent on floor by dog house. There is a flapper door there.
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Tom & Bonnie
2008 Winnebago Aspect 29H
A Class C Not a B+
2010 Ford Flex
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04-05-2007, 03:52 PM
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#31
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Winnebago Camper
Join Date: May 2005
Posts: 16
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[QUOTE]Originally posted by Bob Russo
Is it possible that it's a cold air return for the coach heater only? If I recall correctly (haven't used it since last fall) I get hot air out of that register when furnace is on.
Bob, you are correct, it puts out hot air when gas furnace is on and is cold air return when using motoraid. Good observation.
Rigrunner
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2005 Adventurer 35U, W22. Monroe RV shocks, 2002 CRV
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04-07-2007, 03:40 AM
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#32
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Winnebago Master
Join Date: Jun 2003
Location: Palisade CO
Posts: 895
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There is one more configuration out here.
My Sightseer has two round moveable vents in a panel under the refrigerator. When the "Aux Fan" switch on the dash is set to "High" or "Low" and the engine is running, hot air comes out of those vents (not the floor vents). The heat is supplied via the MotorAid system and does a good job of keeping the rear of the motor home warm when we are traveling in cold weather.
As to how hot it gets, I have measured 140 degrees F at the sink faucet right after we stop.
I asked a Winnebago customer service guy if there was a temperature control device (thermostat) to keep the heat below some preset level and he said "Other than the engine thermostat, no ".
Along with what is transferred to the hot water tank, the run from the front to the rear dissipates enough heat to drop it to the 140 degree level. My engine temp runs between 195 and 210, so that's a pretty good drop from front to back.
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Clay WA5NMR - Ex Snowbird - 1 year, Ex Full timer for 11 years - 2004 Winnebago Sightseer 35N Workhorse chassis. Honda Accord toad.
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04-07-2007, 12:00 PM
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#33
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Winnebago Master
Join Date: Nov 2004
Location: On the Road Westward
Posts: 711
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rvten, I repaired mine. Here is the thread.
Aux Heater
Hope this helps
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Dan & Sharon & Kasey (Our Yorkie Puppy (12 Yrs Old) On the Road (2012 Journey 36M, 2006 Jeep Liberty)
USN-Ret ('65-'93) Fulltimers, Class of 2012
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