Re: Lights and Stuff -- Buzzy's Question and Answer Forum

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05 /19/ 26, 1:09pm

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Subject: Re: Lights and Stuff

Author:
Bob Dilks

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Date Posted: 12/ 30/ 01, 5:26am
In reply to: thebomguy 's message, "Lights and Stuff" on 12/ 26/ 01, 12:38pm

First the fluorescent lights - the ballast (really an inverter from 12 volts to about 1400 volts) degrades over time and needs to be replaced. Blue Bird carries replacement fixtures for about $55 that are head and shoulders above other replacement fixtures you can buy in the $35 to $45 range. There can be many reasons the hot water heater is not working. First lets assume that the circuit breaker in the electrical distribution panel is turned on and has been voltaged checked to see that current is flowing to the on/off toggle switch for the hot water heater and that that switch has aslo been checked for operation so that power is going to the water heater cabinet. Lets also assume the water heater actually has water in the tank. To electrically heat the hot water, the current first passes through a 12 volt operated relay located on the inside water heater cabinet wall that turns off AC current if the low water sensor on the water tank fails to have a ground, either through the tank water as designed, or to the chassis which is a way to circumvent or test the sensor. After passing through the relay, the current next goes through a high temperature switch in the tank designed to cut off the AC current if the low water sensor fails to detect an empty tank. Check to make sure the plunger on the high temperature switch is pushed inward to reset the switch and allow current to flow onward. Next the electrical flow is through the thermostat switch and then on to the heating calrod in the tank. A failure in the relay, high temperature switch, tripped high temperature switch, thermostat switch or calrod can all cause the hot water heater not to operate. Get out your multimeter and check for current at every location.

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