| [GMCnet] Problem with my 78 Royale gas water heater. [message #306767] |
Thu, 08 September 2016 22:54  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
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When I turn the 12V switch on under the sink. The red light comes on for a half second with a click from the water heater. Then the light goes off. OK. I must have an issue with the automatic circuit board. Not an issue. As I have another automatic start circuit board with igniter that I know is good. So I put the spare one in. No bingo. This one does the same thing. When I took ALL. And I mean ALL wiring out of this GMC. I had number coded all wires. But apparently I messed something up. Remember. I'm NO sparky.
Bob Dunahugh
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| Re: [GMCnet] Problem with my 78 Royale gas water heater. [message #306776 is a reply to message #306767] |
Fri, 09 September 2016 06:45  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Bob,
It's been several years since I had an automatic start LPG water heater,
but IIRC, that's the way it works: The light indicates that the spark
igniter is firing -- accounting for the click you hear from the heater. If
the gas doesn't ignite during that time, you have to recycle the switch.
Are you sure the heater has gas available and isn't firing off?
At least check those possibilities before you assume you miswired it. :-)
Ken H.
On Thu, Sep 8, 2016 at 11:54 PM, Bob Dunahugh wrote:
> When I turn the 12V switch on under the sink. The red light comes on for a
> half second with a click from the water heater. Then the light goes off.
> OK. I must have an issue with the automatic circuit board. Not an issue. As
> I have another automatic start circuit board with igniter that I know is
> good. So I put the spare one in. No bingo. This one does the same thing.
> When I took ALL. And I mean ALL wiring out of this GMC. I had number coded
> all wires. But apparently I messed something up. Remember. I'm NO sparky.
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Problem with my 78 Royale gas water heater. [message #306779 is a reply to message #306767] |
Fri, 09 September 2016 07:42 |
77Royale
Messages: 461
Registered: June 2014
Location: Mid Michigan
Karma: 6
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Senior Member |
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From recollection in the owners manual for the Royale, and at least on my 77. when I flip the switch, I here a 2-3 clicks and then it fires. If there is an issue or it does not fire the red light stays on indicating there is a failure.
As Ken said, gas on? I find that after turning on the gas, it sometimes takes 5-6 tries before there is enough pressure to ignite. Cant really say if turning a stove burner on for a few seconds helps or not to bring gas to that side of the coach.
Assuming the burner slide shield is adjusted enough to allow a flame and that the flame spreader is in position? Those all played a minor role when I was going through my heater.
77 Royale, Rear Dry Bath. 403, 3.55 Final Drive, Lenzi goodies, Patterson carb and dizzy.
Mid Michigan
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| Re: [GMCnet] Problem with my 78 Royale gas water heater. [message #306804 is a reply to message #306784] |
Fri, 09 September 2016 11:02 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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You can crack the fitting at the tank and let the gas leak for few seconds
till you smell it .
Avoids having to hit the switch so often.
On Fri, Sep 9, 2016 at 5:57 AM, Larry wrote:
> When I did some remodeling in my coach, I had most everything in the
> kitchen of my coach out, including the gas lines and the tank. When I put
> it all
> back, it took 8 or 10 times doing a start to get the thing to fire. My
> guess is that it senses no fire because the gas has not reached the igniter
> and
> there is no fire, it shuts the gas off so that you do not fill the coach
> with raw gas leading to an explosion. Check to make sure the igniter is
> indeed firing. If it is, cycle it as many times as is needed to get gas
> from the tank, through the empty lines and up to the igniter. Basically what
> you are doing is purging the line of all of the air. JWID
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
>
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--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
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jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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