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Old 11-25-2019, 08:56 AM  
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Re: Limit flow into dishwasher


Do you have excessive water flow issues at any other fixtures in the house?
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Old 11-25-2019, 10:08 AM  
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Re: Limit flow into dishwasher


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Originally Posted by StevenS View Post
I was wrong. It's actually a 3/8" line.



I finally bought such a gauge at Home Depot. Today the water pressure was 65 psi. I've been told that this is too high, and someone else who lives in my city told me that he recorded pressure more that 100 psi (briefly) at his house.

I was advised to install a water pressure reducing value. Is there anything I should know about buying one? Can I just get a standard one from Home Depot?



65 is fine, if you were pushing closer to 80+ I would think about a PRV. At 65, I would say the DW is the problem and just do what ever it takes to make it operate normally.


I would not reduce whole house lower than your 65 PSI reading.
JMHO,
Good luck with the DW
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Old 11-26-2019, 06:38 PM  
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Re: Limit flow into dishwasher


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65 is fine, if you were pushing closer to 80+ I would think about a PRV. At 65, I would say the DW is the problem and just do what ever it takes to make it operate normally.
I called the city and they agreed with you. They told me the pressure in my area will stay close to 65 and should never get above 70 p.s.i.

I'm going to get a 3/8" needle value and install it on the dishwasher line.
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Old Yesterday, 06:32 PM  
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Re: Limit flow into dishwasher


Success! I installed the needle valve, opened it 1/2 turn, and the dishwasher fills and drains properly.
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Old Today, 08:32 AM  
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Re: Limit flow into dishwasher


Huzzah!
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Old Today, 10:51 AM  
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Re: Limit flow into dishwasher


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Originally Posted by StevenS View Post

The dishwasher is 25 years old, but it's a well-built European model, an Asko, that still works well. I am hoping to get some more years out of it by fixing this overfill problem.
If it operated all those years without having this problem, you may want to consider the possibility that the float valve isn't working properly. Maybe the float valve has worked to set the water level all those years and now that it has failed, the timed method is overfilling. Possible...

I can't argue with winning points since you have it kinda fixed, but if the float isn't working and the timer fails, there is no backup safety... You'll not like the results. At least test the float operation by placing something to hold it all the way up and see if the fill cycle is disabled as it should be.
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Old Today, 03:20 PM  
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Re: Limit flow into dishwasher


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If it operated all those years without having this problem, you may want to consider the possibility that the float valve isn't working properly.
There is no float valve, at least not in that sense. According to the manual:

"The drain pump will be started if the water level in the dishwasher is too high...."

This implies that the "level switch" (from the wiring diagram) must trigger the overfill protection routine, because it can't trigger both the overfill and normal fill levels (unless it's an analog sensor, which is not likely for a unit this old).

The manual also instructs the owner to adjust the fill time by adding 10, 20, 40, 60, or 120 seconds, until the water "reaches the underside of the heating element..." This kind of adjustment would not be necessary if the dishwasher had a float valve.
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Old Today, 08:26 PM  
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Re: Limit flow into dishwasher


Your workaround fix will probably do for the rest of that machine's useful life.

From what I read while researching it, the float is located behind the front kick panel. It's purpose, as you have already found, is to kick the pump on if flooding overflow occurs. It has nothing to do with setting the fill level. When a flooding overflow occurs, it causes water to run into the base of the machine, where there is a sump of sorts. Water filling that sump triggers a micro-switch that is engaged by that styrofoam float, which kicks the drain pump on. It stay on forever or until someone takes action to fix the problem. After fixing the overflow cause, it is necessary to manually suction or mop the water from that sump (the drain pump doesn't drain this area) to allow the float switch to return to its normal position.

Unusual method of protection, what? I guess they wanted to make it a little mysterious so that a serviceman would be called, hopefully one familiar with Asko equipment. They even screwed the front kick panel on using Torx head screws. That would thwart most homeowners. Furthermore, your run of the mill serviceman would be doing a lot of mumbling, grumbling and bumbling before he got to the bottom of the problem... "bottom" being the key word there.

Your "bottom" line is, you have it working and now understand enough about it to be smarter than a lot of repairmen. This is a rare animal and so pricey that the folks who generally have it are not inclined to perform DIY projects.
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