Question about Suburban 6 Gallon Water Heater SW6D S/D -

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Installing sw6d what size fuse do i need - Suburban 6 Gallon Water Heater SW6D S/D -

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12 volt 15 amp 120 volt 20 amp only draws 10 amps if blowing bad heater elements

Posted on Nov 01, 2017


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Posted on Jan 02, 2017


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I am looking for a replacement water heater that is in the $500-$600 range. My current water heater is Lochinvar DVN-041. Any ideas?

You can replace with any brand and size to suite your need. But I believe they don't sell you and let you to install by yourself.
You have to buy it in and pay installation fee then they'll
bring in and install for you.

Good luck


Apr 25, 2017 | Water Water Heaters

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What size circuit does an instant hot water heater require

Are you asking what guage of wire or what amperage is the fuse? It should have 12 guage wire and it would need 30 amps.

Nov 08, 2016 | Water Water Heaters

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Why am I continually blowing 3 amp fuses upon energizing the unit?

put a multimeter on the out let side of the fuse holder to earth and check for a short circuit
If you get a resistance reading then maybe the fuse size is incorrect
contact the manufacturer service division on line and get the correct fuse size for the application

Apr 23, 2015 | Water Heaters

1 Answer


in general, it requires power and water.
power and fusing is relative to KW rating of unit
install seperate circuit in fuse panel
run appropriate size wire to location
connect cold in and hot out water lines
connect power, run water to bleed air.
turn on breaker sw.

Dec 09, 2014 | Water Heaters

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Electric Water Heater blows fuse, but only every few years

Your residential water heater is not 9000 watts. Or it would blow the fuse every day and melt the wire. Instead, you have dual-element non-simultaneous 4500 watt water heater.
Look at label for 'total connected watts'
25 amp breaker or fuse and 10 gauge wire is minimum acceptable for 4500 watt water heater.
Troubleshoot blowing breaker or fuse:
Why does it blow fuse once each year?? I don't know.
Fuses and breakers trip when overheating occurs on wire.
Each fuse or breaker is rated for heat, and over time, it will get hot and then cool and then get hot again ... this action weakens fuse or breaker.
To solve problem: install 3500 watt elements (and clean sediment out of tank). Wire will run cooler, and fuse will last longer. Whole fuse box will demand less power, and run cooler, and will last longer as a result. So there is less stress on electric service panel.
3500 watt element will heat water to same temperature, but takes longer. For example: 4500 watt heats 21 gallons per hour, while 3500 watt heats 17 gallons per hour.

Apr 28, 2013 | Water Heaters

1 Answer

SW6D Suburban water heater shuts off prematurely.

These systems use "flame rectification" to sense or prove a flame or pilot flame exists thus it is safe to continue or transition to main burners if a system with a pilot light.
The AC spark is rectified to a DC signal by the flame as the AC current passes through the flame, the flame being a poor conductor only a small amount of DC signal is sent, in the milliamps, so it is not too difficult to interrupt the signal and disrupt the operation, it is doing this for safety.
What you can do is clean the surfaces where the pilot assembly meets the casing and burnish this path clean back to the ignition modules ground or burner ground terminal, there may be a flame sensor too, in this case clean it with 0000 steel wool it is just a ground rod and does not wear out but will build a film that can disrupt the weak DC signal.

Mar 03, 2013 | Suburban 6 Gallon Water Heater SW6D S/D -

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Is it safe to replace the blown fuse which serves only my small hot water system?

fuses wear out over time even if you dont have short to cause it to blow. yes you can replace the fuse,just be sure to off the power to the box before you do.

Jan 04, 2013 | Water Heaters

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I have installed a new control valve assembly on my suburban water heater model SW6D and cannot get it to relight I have no power is there something I should be doing to reset this/

Check for 12 VDC at terminals on ECO and ( Therm)ostat. You should have power on both sides of each. ECO or thermostat may also have a reset pin in between spades that tripped as well, so push it in to be sure as well. If you have power on one side and not the other, replace it. If no power at all, start back at fuse panel, then to switch and out of switch.

Jan 30, 2011 | RTO Suburban Rv Water Heater Dsi Gas Valve...

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1) Turn off power before touching water heater that is shorting or wet or was flooded.
2) Circuit breakers & fuses blow because of heat. A short will cause heat. Tighten screws on terminals inside box, listen for crackling sound/burning smell from loose-fitting parts.
3) Easy test for circuit breakers: move water heater wires to another same-size breaker. If same-size does not blow, then problem is breaker.
4) A short between fuse box and water heater could be gnawed electrical wire. Inspect wire.
5) Wires have size markings. 5500 watt water heater needs #10 wire. 4500 watt water heater needs #10 wire but can work with smaller #12 if distance is not long. See label on side of heater for wattage, voltage, etc. Element wattage is water heater wattage even with 2 elements.
6) Short inside water heater can be elements or thermostat. Open covers and inspect parts for burning. Screws should be very tight against copper wire. Sediment could fill bottom of water heater cause lower element to short.
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Sep 16, 2010 | Little Giant Water Heaters

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Smelling co2 around tank, replaced ventilation but still smell co2? need to see if there is a special way to install ventilation (model # whirlpool fg1f4040s3nov) gas water heater

You may be smelling other products of combustion but CO2 is a color-less/smell-less gas. A water heater should be vented thru 4" vent pipe to either a chimney or a wye which joins it with another appliance and a larger(size must be calculated) connector which connects to the chimney. There can be no reductions in size as you travel toward the chimney, and all pipe must slope at least 1/4"/foot up toward the chimney. Single wall vent pipe can be used unless it is less than 6" from anything flammable in which case type "B" vent may be used with a clearance of down to 1". If all this is correct your chimney may be over-sized or obstructed. Proper venting can be very complicated and technical and takes up most of most installation manuals for any fossil fuel appliance.

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Mar 25, 2009 | Whirlpool Water Heaters

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