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04 /24/ 24, 9:57amLogin ] [ Contact Forum Admin ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 12345[6]78910 ]
Subject: Re: A new owner with a few questions


Author:
John Fitzsimmons
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Date Posted: 07/ 14/ 04, 6:13pm
In reply to: John Fitzsimmons 's message, "A new owner with a few questions" on 07/ 14/ 04, 4:16am

Ok, I feel pretty stupid. Between an old manual and a phone call to Bruce I figured out this DC/AC system. My only remaining hurdle seems to be the electric hot water heater, which doesn't seem to work. Any troubleshooting advice for tracking down what is wrong would be appreciated. Thanks again.

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Replies:
[> [> Subject: Re: A new owner with a few questions


Author:
Lucas Willemse
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Date Posted: 07/ 15/ 04, 1:48pm

There is a lighted on/off switch at the foot of the bed that turns on the power to the water heater. Also the water heater should heat water from the engine if the circulating pump is turned on. This pump is on a switch on the dashboard. With this pump on you should also be able to get heat out of the coach heaters located in each area.

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[> [> [> Subject: Re: A new owner with a few questions


Author:
John Fitzsimmons
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Date Posted: 07/ 16/ 04, 6:57am

I found the switch. It looks like it was squashed by a steel toed boot. I assume the switch on the dash is the auxillary pump switch. I'll try and trace down a part # for the heater switch and work from there. Thanks much for your help.

John Fitz
78 FC Diesel
MA

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[> [> [> [> Subject: Re: A new owner with a few questions


Author:
Lucas Willemse
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Date Posted: 07/ 16/ 04, 6:10pm

John: the heater switch is a standard house type 120 volt AC lighted on/off switch. You should be able to buy it in a hardware store or electrical supply. Just make sure the power to the coach is not plugged in when you change it.

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[> [> Subject: Re: A new owner with a few questions


Author:
Bob Dilks
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Date Posted: 07/ 25/ 04, 1:11pm

Blue Bird wired the AC current to the hot water heater through a large DC relay above the hot water heater. The DC relay is grounded to an insulated screw on the water heater or in the plumbing fittings screwed into the water heater. The screw extends through the insulation and makes contact with the water in the heater grounding the relay and and allowing AC current to flow to the heater. The purpose of the relay is to prevent calrod burn out if the tank is empty which would break the ground, opening the relay and cutting off current. Make sure the tank has water and then attach the grounding wire to the chassis to insure the relay is working. All water heaters have a high temperature cut off switch which cuts off the AC current when the water temperature rises above 180. Since the water heater has a motor aid that runs coolent through the tank at 195 degrees the high temperature switch may be off and needs to be reset. You may also have a burnt out calrod heating unit. Get out your multimeter to test for current flow for all of the above.

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