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New coach - page 2 [message #66750] Sun, 06 December 2009 13:02 Go to next message
jayrabe is currently offline  jayrabe   United States
Messages: 509
Registered: June 2009
Location: Portland, OR
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Senior Member
Well, the adventure of discovery has begun. I managed to get the coach to pass the OR DEQ tests, so it's officially registered! Huge happiness. It was an interesting saga. The first time I took it in they refused to test it because the idle was oscillating as I described before. I found a hose that was a little loose and pushed it on more securely, and took it in the next day and the oscillation was gone so they tested it, but it failed for HC (568 measured with 500 max allowed). So I drove it another 30 minutes and went to a different testing station and it passed. Hooray!

Then Friday I stopped by the Cascade Rally here in Fairview to show it off and meet bunches of great people and see some other beautiful coaches, and spent some time with the so generous expertise of DJ Eberhard, and the good news was he gave me a tutorial on tightening my fan belts which were squealing (successfully fixed after spending money to start my collection of tools), and the bad news was he told me the hose I tightened had nothing to do with the vacuum or the idle. So I'm back to having an intermittent problem, though it hasn't returned in the two days since.

OTOH another problem has come up, that being a complete drop out of power and gas pedal response after coming off a freeway. Happened about 3 times. A few gooses on the gas and it recovered, the engine didn't die, just lost all power. This is the Howell EFI. DJ thought it might be the oxygen sensor, which is an un-heated type. Any suggestions?

Finally, I can't figure out how to get the furnace to come on. The propane tank is on, the breaker is on, the blower fan runs, the thermostat is on and turned up, but no heat. Documentation makes me believe there's another gas shutoff valve just for the furnace, but I can't find it. Haven't gotten a response from the PO yet. The furnace is new, an Atwood, I think model 8500-IV. Suggestions?

Thanks to the great hospitality to the Cascaders at Fairview, and DJ especially. The GMC community is the most incredible thing I've ever experienced.

J "haven't named her yet" Rabe


Re: New coach - page 2 [message #66753 is a reply to message #66750] Sun, 06 December 2009 13:49 Go to previous messageGo to next message
fred v is currently offline  fred v   United States
Messages: 999
Registered: April 2006
Location: pensacola, fl.
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Senior Member
there usually is a shutoff valve for the furnace. mine is right where the gas pipe goes into the furnace but i've heard of the valve being under the coach or inside a cabinet or under a bunk.

once it's turned on it may take several tries to make it light off. the gas has to get to it. you should be able to hear the solonoid valve click on then off. turn the thermostat off, let the fan stop then turn it back on. if the furnace doesn't light off it will go into lock out and has to be re-set as stated above.


Fred V
'77 Royale RB 455
P'cola, Fl
Re: [GMCnet] New coach - page 2 [message #66850 is a reply to message #66750] Sun, 06 December 2009 13:46 Go to previous messageGo to next message
Mr ERFisher is currently offline  Mr ERFisher   United States
Messages: 7117
Registered: August 2005
Karma: 2
Senior Member
Do not forget to put on an APC ,

http://gmcmotorhome.info/APC.html

I know that coach had some alternator problems. DJ has them.

gene


--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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Re: [GMCnet] New coach - page 2 [message #66851 is a reply to message #66753] Sun, 06 December 2009 13:54 Go to previous messageGo to next message
Gary Casey is currently offline  Gary Casey   United States
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Registered: September 2009
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Exactly as Fred says. One suggestion is to light the stovetop first to get gas at least all the way there. Then look for the shutoff valve. Then you may have to try the start several times to get gas all the way to the burner. BTDT.



________________________________
From: fred veenschoten <fredntoni@cox.net>
To: gmclist@temp.gmcnet.org
Sent: Sun, December 6, 2009 12:49:54 PM
Subject: Re: [GMCnet] New coach - page 2



there usually is a shutoff valve for the furnace. mine is right where the gas pipe goes into the furnace but i've heard of the valve being under the coach or inside a cabinet or under a bunk.

once it's turned on it may take several tries to make it light off. the gas has to get to it. you should be able to hear the solonoid valve click on then off. turn the thermostat off, let the fan stop then turn it back on. if the furnace doesn't light off it will go into lock out and has to be re-set as stated above.

--
Fred V
'77 Royale RB 455
P'cola, Fl
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[GMCnet] Furnace problem [message #66855 is a reply to message #66851] Sun, 06 December 2009 16:07 Go to previous messageGo to next message
jayrabe is currently offline  jayrabe   United States
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Registered: June 2009
Location: Portland, OR
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Senior Member

Still haven't found a shutoff. I did find a "restart switch" in the furnace compartment. It is a toggle, not a push-button like a thought it might be, and has two positions, either off or restart, and I found it in the restart position. I'd already run the stove, so I know I had gas flow.

Confused about "several tries" to get it to start. I have an "on/off" lever on the bottom of the thermostat, and the blower power switch. I had thought that all I needed to do to start it was turn the gas on, turn on the blower for a time, then turn on the thermostat and crank up the temperature.

J "dazed and confused, and cold" Rabe




> Date: Sun, 6 Dec 2009 11:54:08 -0800
> From: casey.gary@yahoo.com
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] New coach - page 2
>
> Exactly as Fred says. One suggestion is to light the stovetop first to get gas at least all the way there. Then look for the shutoff valve. Then you may have to try the start several times to get gas all the way to the burner. BTDT.
>
>
>
> ________________________________
> From: fred veenschoten <fredntoni@cox.net>
> To: gmclist@temp.gmcnet.org
> Sent: Sun, December 6, 2009 12:49:54 PM
> Subject: Re: [GMCnet] New coach - page 2
>
>
>
> there usually is a shutoff valve for the furnace. mine is right where the gas pipe goes into the furnace but i've heard of the valve being under the coach or inside a cabinet or under a bunk.
>
> once it's turned on it may take several tries to make it light off. the gas has to get to it. you should be able to hear the solonoid valve click on then off. turn the thermostat off, let the fan stop then turn it back on. if the furnace doesn't light off it will go into lock out and has to be re-set as stated above.
>
> --
> Fred V
> '77 Royale RB 455
> P'cola, Fl
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

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Re: [GMCnet] Furnace problem [message #66860 is a reply to message #66855] Sun, 06 December 2009 18:30 Go to previous messageGo to next message
Gary Casey is currently offline  Gary Casey   United States
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Registered: September 2009
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Senior Member
I might be over my head now - there are certainly others more expert on this sort of thing. As far as I know, if the gas is on, power is on, and the thermostat is turned up it should try to start - the combustion blower will come on and presumably the fire will start. If not, the blower will turn back off after a time. The blower control on the thermostat doesn't have to be fussed with. I think.
Gary



________________________________

Still haven't found a shutoff. I did find a "restart switch" in the furnace compartment. It is a toggle, not a push-button like a thought it might be, and has two positions, either off or restart, and I found it in the restart position. I'd already run the stove, so I know I had gas flow.

Confused about "several tries" to get it to start. I have an "on/off" lever on the bottom of the thermostat, and the blower power switch. I had thought that all I needed to do to start it was turn the gas on, turn on the blower for a time, then turn on the thermostat and crank up the temperature.

J "dazed and confused, and cold" Rabe



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Re: [GMCnet] Furnace problem [message #66863 is a reply to message #66860] Sun, 06 December 2009 18:53 Go to previous message
k2gkk is currently offline  k2gkk   United States
Messages: 4452
Registered: November 2009
Karma: -8
Senior Member

I would guess that there is some sort of interlock
that is keeping gas from flowing to the burner. I
would not be surprised if your control valve has
become inoperative.

D C "Mac" Macdonald
Oklahoma City, OK


----------------------------------------
> Date: Sun, 6 Dec 2009 16:30:55 -0800
> From: casey.gary@yahoo.com
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Furnace problem
>
> I might be over my head now - there are certainly others more expert on this sort of thing. As far as I know, if the gas is on, power is on, and the thermostat is turned up it should try to start - the combustion blower will come on and presumably the fire will start. If not, the blower will turn back off after a time. The blower control on the thermostat doesn't have to be fussed with. I think.
> Gary
>
>
>
> ________________________________
>
> Still haven't found a shutoff. I did find a "restart switch" in the furnace compartment. It is a toggle, not a push-button like a thought it might be, and has two positions, either off or restart, and I found it in the restart position. I'd already run the stove, so I know I had gas flow.
>
> Confused about "several tries" to get it to start. I have an "on/off" lever on the bottom of the thermostat, and the blower power switch. I had thought that all I needed to do to start it was turn the gas on, turn on the blower for a time, then turn on the thermostat and crank up the temperature.
>
> J "dazed and confused, and cold" Rabe
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