Jan, I'm still opting for cold water back feed. Have you noticed whether the recirculator pump tries to run with only the dw drawing water. Of course this would not make a difference with the cold water valve closed right now. If you look at that line volume chart, you do not have enough water line to cause this much of a degradation of the water temp. As you are running right now with the cold water valve shut, you are getting water cooling to some extent just due to the time between cycles, I think you would also see this effect at the faucet on the sink. One other test would be to return you water line-up to normal by opening the cold water valve and then run the dw while also running the hot water at the sink just enough to make sure that you have good hot water at that location for a couple of fill cycles. The water at the sink and at the dw should be very nearly the same allowing a little for line loss.
Outside temp right now, 41 and misty. Inside temp 72.6 Temp overnight in the cabinet where line is was 60. Not checked inside DW and have to wait till it cools off. As for the recirclator - don't even know how to check such things. It's just a little "box" connected (?) low on the water heater, line goes up and into the wall, similar to the normal hot water line - and both lines are hot to the touch. I'd have to look again to see if there is another return line there.
The DW comes with a blanket of insulation that goes over the top and both sides. I've thought I might put a layer of insulation on the wall behind it - but not sure that would be worth the trouble, since the DW itself is well insulated.
The 3rd fill, 30 minutes into the cycle is registering 124F. GE manual says "The entering water should be at least 120F and not more that 150F for effective cleaning and to prevent dish damage. Check the water temperature with a meat thermometer. Turn on the faucet nearest the DW place the thermometer in a glass and let the water run continuously into the glass until the temp stops rising.
One thought: what is room/ air temp? Cold/ snow where you live? Are you keeping space at 70'f, or 55'f? What is the temperature inside a dry DW pan, first thing in the morning? (I.e coldest part of day) Are you dumping 2-1/2-gal of 120'f water into a 4-5 sq. feet of 45-50'f (or colder) steel pan?
2) (re: recirc pump) WHAT is the temp of the water/ water pipe at the circ pump return pipe? (maybe even a few feet away from pump on the return side)
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Posted by: Dale Schoepflin <dalu@hbcomm.net>
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