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01-01-2008, 06:18 PM
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#1
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Senior Member
Join Date: Jan 2008
Location: Big Bear Lake, Ca
Posts: 390
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Does anyone have a schematic/diagram for a 1991 heater control valve? It has both a slide and a vacuum control which seems to be able to over ride the slide. Any idea on how this works or what a replacement part number would be. On the dash it looks like my old F250 4x4.
Any help would be appreciated. Need to get it working for the trip to Quartzite.
Any idea on how the heater valve works on this would be helpful.
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HR 1991 31' Alumilite
1990 Wrangler Heavily Modified Toad
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01-01-2008, 06:18 PM
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#2
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Senior Member
Join Date: Jan 2008
Location: Big Bear Lake, Ca
Posts: 390
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Does anyone have a schematic/diagram for a 1991 heater control valve? It has both a slide and a vacuum control which seems to be able to over ride the slide. Any idea on how this works or what a replacement part number would be. On the dash it looks like my old F250 4x4.
Any help would be appreciated. Need to get it working for the trip to Quartzite.
Any idea on how the heater valve works on this would be helpful.
__________________
HR 1991 31' Alumilite
1990 Wrangler Heavily Modified Toad
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01-04-2008, 11:39 AM
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#3
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Community Moderator
Nor'easters Club Newmar Owners Club Workhorse Chassis Owner
Join Date: Oct 2004
Location: Salisbury,Ma. 01952
Posts: 13,617
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Welcome Forest Grump to the Ford forum and irv2. 
Looking thru the Ford parts links above can not find the valve your looking for by itself. 
I would remove it and go to NAPA or Ford dealer to see if it can be matched up.
The vacume lines would be coming off the engine some wheres to your control on dash you could have a dried out air line or disconnection from source.
I'll link up your question to new member forum maybe one of the techs will pick this up.
Enjoy the forums and do post often. 
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01-04-2008, 07:45 PM
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#4
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Moderator Emeritus
Monaco Owners Club Excel Owners Club
Join Date: Nov 2006
Location: Hangin' with Sacs and the Pins
Posts: 9,399
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Forest Grump...
First of all...I love your signature name!  Second...welcome to iRV2!  It happens to be the friendliest RV forum out on the web...and usually the most knowledgable. (You may have them stumped on this one though!  )
I hope you are able to find what you are looking for in time for Quartzite. Keep us posted as to your progress.
Again...welcome to iRV2 and Good Luck again finding your control valve!
MM
__________________
 MM
*MonacoMama with the 2 Pins & SacsTC Nearby* *2007 Monaco Diplomat 40' SFT<>2006 Chevy VortecMax Toad<>2006 Buick Lucerne Leading the Way*
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01-04-2008, 11:55 PM
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#5
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Community Moderator
Gulf Streamers Club Country Coach Owners Club Appalachian Campers
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 8,258
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Forest Grump, I am sorry that I cannot help you with your heater control valve but I did want to welcome you to iRV2.com. We are glad to have you join us here and we look forward to reading of your adventures and experiences. Good luck and stay safe.
__________________
Mike, Certified Master RV Technician
Amy, RV Merchandiser; Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser w/ Banks & 2 toads
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01-05-2008, 06:45 AM
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#6
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Senior Member
Join Date: Feb 2000
Location: Erie, PA
Posts: 1,070
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 Forest Grump, Welcome to the iRv2 website, glad you joined our group. Ed.S
__________________
2005 Newmar Mountain Aire W-24 , 2006 Jeep Commander Limited towed vehicle Newmar Kountry Klub 7284L, Pennsylvania State Directors
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01-05-2008, 08:10 AM
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#7
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Senior Member
Join Date: Dec 2003
Location: Beverly Hills, Mich
Posts: 796
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A call to SCS Frigette may help. They supply lots of RV manufacturers (and others) with heater and AC parts. They may or may not have supplied the parts to yours, but I bet they can help. They know how these systems are set up.
SCS Frigette
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Tim.
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01-06-2008, 02:11 PM
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#8
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Senior Member
Join Date: Dec 2006
Location: Atlanta, GA. , South Beach, FL. Naples, Fl , Coral Gables,FL.
Posts: 1,109
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Welcome to iRV2.com , and I like your name Forest Grump, Is that your real name? 
like the movie?
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01-06-2008, 03:20 PM
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#9
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Senior Member
Join Date: Jan 2008
Location: Big Bear Lake, Ca
Posts: 390
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I found a MH heater control valve on ebay that is cable regulated and it looks exactly like the one in my MH but it doesn't have the vacuum overide so I ordered it.
Thanks for the welcome - Forest Grump is my real name at least some people think so. I am just one member of the Grump Old Men.
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HR 1991 31' Alumilite
1990 Wrangler Heavily Modified Toad
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01-06-2008, 09:15 PM
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#10
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Member
Join Date: Jul 2006
Posts: 65
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Evans Tempcon also supplies a lot of the Ford chassis coach HVAC systems. They have historical photos that may help in identifying your system.
If it looks like an OEM ford, I would bet it is an Evan Tempcon system.
Try Evanstempcon.com They have a number of schematics and on-line troubleshooters that should help you work through the problem.
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01-11-2008, 02:55 PM
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#11
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Senior Member
Join Date: Jan 2008
Location: Big Bear Lake, Ca
Posts: 390
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I done doood it!. I got a new valve from eBay that was lever operated but with no vacuum overide. It was H shaped with 4 ends to fit 5/8 inch hoses. The old valve turns out was in two parts. A lever operated valve which was broken and a H shaped fitting with 4 ends. When the valve closed the hot water was diverted through the H to to hot water return.
The new one diverts the water the same way but the valve is permanently connected to the H and it opens and closes. The air conditioner blows cold air when on and the heater blows warm air when it is on. Sometimes I truely amaze myself. And I only used one rather large bandage and I don't think I will need stitches.
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HR 1991 31' Alumilite
1990 Wrangler Heavily Modified Toad
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01-11-2008, 05:14 PM
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#12
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Community Moderator
Nor'easters Club Newmar Owners Club Workhorse Chassis Owner
Join Date: Oct 2004
Location: Salisbury,Ma. 01952
Posts: 13,617
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Good job  Forest wait until you change out your spark plugs. Give a hint use gloves. 
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01-11-2008, 05:46 PM
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#13
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Senior Member
Join Date: Jan 2008
Location: Big Bear Lake, Ca
Posts: 390
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by "007":
Good job Forest wait until you change out your spark plugs. Give a hint use gloves. </div></BLOCKQUOTE>
I let the mechanic do the plugs and all new heater hoses especially the set that goes all the way to the hot water heater.
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HR 1991 31' Alumilite
1990 Wrangler Heavily Modified Toad
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01-14-2008, 10:38 AM
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#14
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Senior Member
Join Date: Dec 2006
Location: Atlanta, GA. , South Beach, FL. Naples, Fl , Coral Gables,FL.
Posts: 1,109
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Forest Grump:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by "007":
Good job Forest wait until you change out your spark plugs. Give a hint use gloves. </div></BLOCKQUOTE>
I let the mechanic do the plugs and all new heater hoses especially the set that goes all the way to the hot water heater. </div></BLOCKQUOTE>
same here , I won't fool with it also.that is why I paid to a mechanic to do the not so easy jobs.
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