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11-26-2020, 03:13 PM
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#1
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Senior Member
Monaco Owners Club
Join Date: Oct 2020
Posts: 152
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Exhaust fan issue
My kitchen roof exhaust fan has been intermittently working for the past couple weeks. Finally it stopped working altogether. I’ve read that the ground that’s provided when the lid is opened can be funky, and that’s the first thing I looked at. But that works fine. It turns out it’s this little box to the side of the fan, opposite the power knob.
On this box there is a yellow wire coming in that has 12vdc, as well as two wires that are jumpered together that have 12vdc. The power wire going to the fan is the single white wire leaving the box, and when I jumper 12 volts to it the fan works. Is this little box a relay of some sort? Can I just bypass this box?
In the pic that’s my yellow jumper hanging down.
__________________
2000 Monaco Diplomat 38A
Cummins 8.3 ISC 315HP
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11-26-2020, 03:25 PM
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#2
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Senior Member
Monaco Owners Club
Join Date: Oct 2020
Posts: 152
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I pulled it down and it looks like it is a relay
Omron TV-8
So I guess my question is when is this relay open to inhibit the fan from working? Like is the fan inhibited while driving down the road?
And can I just bypass it.
__________________
2000 Monaco Diplomat 38A
Cummins 8.3 ISC 315HP
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11-26-2020, 04:01 PM
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#3
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Senior Member
Join Date: Jun 2012
Location: NorCal
Posts: 2,153
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May have something to do with the hood door being open/closed, cuts power when door is closed?
__________________
Outbound
2002 Monaco Executive 500 ISM
2004 GMC 2500HD 4X4
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11-26-2020, 04:24 PM
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#4
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Senior Member
Monaco Owners Club
Join Date: Oct 2020
Posts: 152
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There is a relay in the opposite corner of the fan that has the door wire going through it. But this is for something else.
__________________
2000 Monaco Diplomat 38A
Cummins 8.3 ISC 315HP
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11-26-2020, 04:42 PM
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#5
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Senior Member
Monaco Owners Club
Join Date: Nov 2017
Posts: 1,065
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Could it be the feed wire from the temperature control on the wall?
Ie, it sends the signal to the relay to turn on the fan using low voltage and the relay then shunts the connections?
What gets everyone on those fans is that, in my Diplomat, there is a control thermostat on the wall that turns the fan on or off due to ambient temperatures (a nice feature in my mind).
It's the 'third variable' that a lot of people tend to overlook.
__________________
Best!
Bob Jones - 2000 Monaco Diplomat
ISC315 with Linnig Electromechanical Fan
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11-26-2020, 05:38 PM
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#6
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Senior Member
Monaco Owners Club
Join Date: Oct 2020
Posts: 152
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I’m not sure I have one of the control thermostats on mine. Where is it located in your Diplomat?
Edit: Oh man I feel silly. I found the thermostat. I thought that was for the furnace. Lol. Thanks.
__________________
2000 Monaco Diplomat 38A
Cummins 8.3 ISC 315HP
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11-26-2020, 05:40 PM
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#7
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Senior Member
Monaco Owners Club
Join Date: Nov 2017
Posts: 1,065
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Right above the furnace/AC panel. It looks like this (the top one);
Or, the LEFT one since the site turned my picture sideways....
__________________
Best!
Bob Jones - 2000 Monaco Diplomat
ISC315 with Linnig Electromechanical Fan
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11-26-2020, 05:51 PM
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#8
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe
Posts: 4,440
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Quote:
Originally Posted by JerryLook
I’m not sure I have one of the control thermostats on mine. Where is it located in your Diplomat?
Edit: Oh man I feel silly. I found the thermostat. I thought that was for the furnace. Lol. Thanks.
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That's funny! I have a freind that bought a MH, and was complaining that the fan wouldn't work.
I walked over to the thermostat, turned it down, and VOILA! the fan worked! 
__________________
Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand! 
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11-26-2020, 05:59 PM
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#9
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Senior Member
Monaco Owners Club
Join Date: Nov 2017
Posts: 1,065
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Exactly! 
__________________
Best!
Bob Jones - 2000 Monaco Diplomat
ISC315 with Linnig Electromechanical Fan
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11-26-2020, 08:29 PM
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#10
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Senior Member
Monaco Owners Club
Join Date: Oct 2020
Posts: 152
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I bet if I was in a colder area right now I would have realized that thermostat wasn’t for the furnace real fast 
Tomorrow it’s going to be 80 degrees for the high.
__________________
2000 Monaco Diplomat 38A
Cummins 8.3 ISC 315HP
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