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Originally Posted by Bernbob
... the water heater no longer works while on shore power. I checked the breaker and all the fuses in the converter.
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The fuses control only the 12-volt circuits, so stop mucking with them. They are not involved in the problem.
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No blown fuses and the breakers are working as they should(110 coming in and 110 going out, and yes I checked all breakers, including the 20-20).
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Good. So you know that 120 VAC is heading out toward the water heater.
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But----I noticed that there is no power at the outside heater switch(checked by putting an ohm meter across the leads on the switch and found no current at that point).
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I don't understand what you did here. You are trying to check for VOLTAGE - or is it CURRENT - using an OHM meter? If shore power was on, and you put a
voltmeter across the switch leads, and found no voltage when the switch is switched on, then that is expected. There should be no voltage across a switch that is on, since the switch is a short circuit. If that is not what you meant, please clarify.
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I checked the switch with an ohm meter with no power and the switch seems to be functioning fine.
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So the switch measures zero ohms in the ON position, and infinite ohms in the OFF position? Please confirm that this is what you found. That is what you would expect to find.
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I did notice that when I pulled the fuses in the converter(30amp) each lit the little red light next to it, with the exception of one, that light only flickered for a second and then remained out(don't know what it means though).
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Again, you shouldn't be mucking with the fuses.
The one thing you don't seem to have done is to check to see if shore power is getting to the switch. To do this, turn the switch OFF. Put the first probe of your voltmeter on any convenient ground, and leave it there. Clip it on somehow so it stays in place. You don't want to have to hold it in place with your hand.
Now put the second probe on the side of the switch that is wired to the incoming power (not the side that is wired toward the heater element). You should see 120VAC. If so, this verifies that power is getting to the switch.
Now move the second probe to the other side of the switch, the side that is wired toward the heater element. You should see 0 volts. This verifies that the switch turns OFF properly.
Now, without moving the probe, turn the switch ON. You should see 120 VAC. This verifies that the switch turns ON properly.
When you have done this, let us know which step is failing - because if they are all good, then power is reaching the water heater as it should.
By the way, without meaning to offend, are you sure that you have enough knowledge of electricity to be doing this? Shore power is dangerous. You can hurt or kill yourself in an instant. If you don't have the skills and knowledge, you should stop, and find someone who does.
Bill
No electrical power to the water heater
Linear Mode
