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01-27-2022, 02:02 PM
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#1
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Senior Member
Join Date: Dec 2021
Posts: 340
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Heater control valve - identification and repair
The RV is a 2002 National Tradewinds LE 390, Spartan chassis with a Cat 3126e. After running up to temperature and stopping I have been noticing a small puddle under the right front. It appears to be anti-freeze.
Yesterday I crawled under and took the picture below. Anti-freeze can be seen on the connection.
I would appreciate any pointers on identification, manufacturers, and replacements. I am not even sure of the means of operation. Are they purely mechanical or are they electric and 'motor' driven?
Thanks, Dan
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01-27-2022, 05:29 PM
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#2
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,982
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There are 3 types 12V electrical controlled and cable-controlled, however vacuum controlled are the most commonly used. Does yours have one black 1/8" hose to it or 2 wires?
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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01-27-2022, 06:13 PM
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#3
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Senior Member
Join Date: Mar 2019
Location: Braidwood Il.
Posts: 8,300
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I blew pic up on PC looks like wires/plug left side bottom. I'm suspect of "what's going on" with 3 hose clamps on one hose on topside. Might be an extra elbow that would need three, but doesn't look like it. The cable driven valve could leak valve stem packing seal, but electric is more sealed. I suppose it could crack or degrade.
__________________
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
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01-28-2022, 07:55 AM
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#4
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Senior Member
Join Date: Dec 2021
Posts: 340
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Thank you for those leads. I will remove the tie straps and take move pictures. This is in a semi reasonable place to access.
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01-28-2022, 08:56 AM
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#5
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,500
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Dan while you're in the front cap , see if you can get a look for the brand name on the HVAC housing .
I believe your set up is Evans/Tempcon , but you need to be sure for part supply .
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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01-28-2022, 11:11 PM
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#6
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Senior Member
Join Date: Mar 2019
Location: Braidwood Il.
Posts: 8,300
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Looks like I'm seeing some dried residue on the three clamps on top as well. Do you have enough slack to cut that back and re-install . By the looks of it ,first thing I would do/ look at. Fixed more than a few leaks just cutting a hose back to better rubber.
__________________
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
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01-28-2022, 11:18 PM
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#7
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Senior Member
Join Date: May 2013
Location: S. California
Posts: 1,379
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Hard to be say by that picture. Could be as simple as tightening clamps.
__________________
2003 Monaco Knight 36ft PST Triple Slide- 315 ISC
2007 Jeep Grand Cherokee 3.0 Diesel 4x4
2- 2013 Yamaha VXR's 70MPH+. 2019 Sun Tracker 18ft Pontoon w/ 75hp Mercury
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01-30-2022, 12:22 PM
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#8
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Senior Member
Join Date: Dec 2021
Posts: 340
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Are the main water lines from the engine forward steel or rubber?
I would imagine the main lines are steel tube. If that is the case then the I can look for the joint and replace the connector section.
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01-31-2022, 08:14 AM
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#9
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,500
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I'm not positive about Spartan chassis , but Freightliner uses hoses from the engine to the front . Too many twists and turns for metal tubing .
Replacement is fun .....NOT!
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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01-31-2022, 09:35 AM
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#10
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Senior Member
Nor'easters Club Holiday Rambler Owners Club
Join Date: Oct 2016
Location: Monadnock Region of New Hampshire
Posts: 1,519
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IF this valve is the one I think it is, you can get the valve itself without the actuating motor easily.
I actually probably have a new spare in my parts stock in the shop, though that won't help you very much!
Valve is not terribly expensive either.
I'd suggest removing it and taking it to a good parts store and see if they can match it up. (I'd suggest Advance Auto or NAPA...)
__________________
My name is Peter, and I'm never going to grow up.
- Winnebago Era 2010 Class B
- Holiday Rambler 2006 Ambassador 40-DFD Class A
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