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Old 08-31-2015, 04:18 PM   #1
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Suburban SW6DE Water Heater No Power at Secondary Switch

I have the Suburban 6 Gallon Water Heater SW6DE installed on my Sabre 320 FQDS and am having trouble with the electric mode with my water heater. LP mode works fine.

I busted out my multi-meter and wire cutters/strippers and determined there is 120V AC at the water heater. However the secondary switch mounted on the front of the water heater has no power.

I don't have an internal wiring diagram of this heater, but I thought the thermostat and hi-cut off switches were downstream from the secondary switch. Is that the case? Any ideas what could be wrong?

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James
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Old 08-31-2015, 04:37 PM   #2
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I have the Suburban 6 Gallon Water Heater SW6DE installed on my Sabre 320 FQDS and am having trouble with the electric mode with my water heater. LP mode works fine.

I busted out my multi-meter and wire cutters/strippers and determined there is 120V AC at the water heater. However the secondary switch mounted on the front of the water heater has no power.

I don't have an internal wiring diagram of this heater, but I thought the thermostat and hi-cut off switches were downstream from the secondary switch. Is that the case? Any ideas what could be wrong?

Best Regards
James
Not sure exactly where you are measuring 120 AC voltage at, but if you have voltage at the element, then voltage is going thru the switch.

This FAQ may help, and has a schematic for the 120 volt side.

Suburban's electric switch and much more

The hi-limit thermostats, one for the electric, and one for the propane...are underneath the rubber covers (that you push to reset) as in the pic.



If the water is already hot inside the heater thru the propane/dsi...then you won't have power at the electric element, since the thermostat is open and not letting the circuit complete.
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Old 08-31-2015, 04:44 PM   #3
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As with most sabres there's an interior electric switch and the switch on the wh.
Outside switch must be on in order to use the interior switch.
If outside switch is off then the interior one won't work either.

So as wmtire asked, where did u find power?

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Old 08-31-2015, 04:45 PM   #4
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There is no power at the secondary switch so the element is not getting power.
There is power at the tank but not at the secondary switch.
The secondary switch is in the lower left of your diagram covered by the propane manifold.
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Old 08-31-2015, 04:47 PM   #5
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If the element isn't getting power then where did you find 120v @?

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Old 08-31-2015, 04:48 PM   #6
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Both switches on.
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Old 08-31-2015, 04:49 PM   #7
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At the junction box into the water heater there is 120V power.
Inside that junction box there is another little black component that has the 120V positive going through, and two additional wires going into it (red/yellow I think).
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Old 08-31-2015, 04:50 PM   #8
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So your getting 120v behind the wh in the junction box?

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Old 08-31-2015, 04:52 PM   #9
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So your getting 120v behind the wh in the junction box?
Yes I have power at the junction box.
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Old 08-31-2015, 04:55 PM   #10
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Have you checked power at interior switch?

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