Water Heater Not Heating on 120 Volts |
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tsunami
Senior Member Joined: 05 Oct 2009 Location: MINNESOTA Status: Offline Points: 426 |
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My 150 has the water heater located under the seat behind the electrical panel unit. You have to remove the seat cushions and unscrew some square fastener screws on the plywood seat 'top'. After removing the plywood you should be able to look down on the heater. The 'long-loose' hose unconnected on one end is the 'winterizing' hose for pumping RV antifreeze into the plumbing. There should be three white PVC T-valves next to the heater. The central valve (the three valves are set in an 'H' pattern) should be turned so that the valve lever is perpendicular to the piping. The other two valves should be parallel to the piping. The valve handles are oval in shape, the long axis is the flow direction.
This will guide water from the pump through the heater. If you forget to set the central valve perpendicular...most of the water will bypass the heater and you will get only warm or just cold water out of the hot water lines. Don't forget to open the central valve and close the other two when 'winterizing'...you do not want RV antifreeze pumped into the heater for the winter. |
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tsunami
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Sixgunner
Senior Member Joined: 18 Apr 2011 Location: West Virginia Status: Offline Points: 228 |
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I think it's fairly certain that the problem with your water heater lies either with bypass valve position or electrical connection. The first thing I'd suspect is valve position. Since the 170 floorplan is similar to my 177, I would presume the valves to be under a plywood panel beneath the bed or the dinette seat on the same side as the sink. There's a very informative thread you can find at: http://www.rpodnation.com/water-heater-questions_topic153_page1.html. Page two includes a photograph of the valve positions.
From my experience, the water heater comes to temperature much more quickly using propane. So, assuming you've eliminated valves and electrical faults, it's possible if you allow a little more time, you'll notice the electric element working. When you pull the plywood cover off, it might be a good idea to go ahead and cut the portion of the panel covering the water heater so you can more easily access it for winterizing and further maintenance. Refer to the photographs in this thread of Sandpiper performing that very modification: http://www.rpodnation.com/list-your-mods-no-comments-please_topic568_page5.html. |
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tsunami
Senior Member Joined: 05 Oct 2009 Location: MINNESOTA Status: Offline Points: 426 |
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If you have a 15(*) model the water heater and pump are located together underneath the seat. The left seat in my unit. After removing the seat cushions you will see a plywood cover screwed down. You have to unscrew the panel and remove it. You should then see the heater and the pump. Looking at the heater the water pipes are installed in an H pattern. The valve in the center of the H is the bypass valve. If it is parallel to the pipes...cold water will generally bypass the heater and you won't get hot water. To get hot water from the heater, the central bypass valve should be gently turned so the T-handle is perpendicular (closed) to the pipes. The other two valves should be parallel (open) to the pipes. When winterizing...the bypass valve should be parallel (open) and the two side valves should be turned perpendicular (closed) to the pipes.
The 120VAC electric heater element should be thought of as an auxiliary heater to the main propane heater. If the tank has been cold for awhile, I turn on the propane heater to bulk heat the water...the electric heater tops off the heating. Unless I drain a lot of hot water (showering, etc.) the electric heater generally keeps the water warm. The electric heater by itself will take a long time to heat a cold tank up to useful temps. Don't expect hot water for hours! The manufacturer's manual also states that the electric heater is auxiliary to the propane tank. If the electric heater is turned on, I always have hot water in the morning without the propane heater ever coming on at night and disturbing my sleep. |
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tsunami
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