Whirlpool Duet Washer GHW9150PW0, FH Code
Posted 25 April 2008 - 01:39 PM
(I should add that my wife informed me that she has been seeing this code from time to time. Whenever that happened, she simply stopped the washer, unplugged it, let it sit for a while, plugged it back in, and restarted it.......she never told me she was doing that until today, when it refused to run after her "standard fix.")
Based on what I learned here, I've cleaned out the eco valve, made sure both hot and cold water flow well and the inlet screens are clear, flushed out the drain hose, checked that the pressure switch tubing is in good shape and leak free, no siphon problem, and made sure there was no "gunk" clogging the connection between the tub and the pressure tube connector assembly. I can blow slowly into the pressure tube and hear two clicks as pressure builds and two clicks as pressure is released. The tubing is in perfect shape, it hadn't come loose and contacted the belt or pulley. Nothing seems to be leaking inside, it was all dry both before and after taking various connections apart for cleaning.
I had been assuming the flowmeter is not the problem, because I was able to get a couple of normal/casual cycles to run in succession (with warm wash selected.) One of the threads, if I didn't misread it, implied that if a flowmeter problem existed, the washer wouldn't run past the first minute.....and it ran two consecutive cycles perfectly. Something told me that I should run a third one, though.
I didn't have a timer running, but that last normal/casual cycle running with no load in the tub crapped out fairly early in the cycle....seemed to be more than a minute, but less than five minutes from pressing the start button. (Watching all that water flow, cycle after cycle......I had to go vent some liquid myself, and heard the dreaded "beeep beeep" from the bathroom on the other side of the wall :X!)
Some further reading led me to run three diagnostic cycles, and all three terminated exactly 60 seconds after the display switched from C:00 to C:01 and water had flowed freely into the tub. The tub appeared to have a normal amount of water in it every time.
What sort of bothers me is that the troubleshooting guide in the unit states that "If after 30 seconds the control does not detect water entering the machine.....OR.....after 8 minutes the flow sensor has detected 10.5 gallons of water...etc., etc." I always get the FH error at exactly 60 seconds into the C:01 step. I've never noted a problem at only 30 seconds or at 8 minutes into a cycle, diagnostic or normal/casual.
Does the 30 seconds refer to some other point, not the start of the C:01 diagnostic cycle step?
How many clicks should I hear if I blow into the pressure tube? Two, or three?
Are intermittent problems with the flowmeter common?
Posted 25 April 2008 - 02:00 PM
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Posted 25 April 2008 - 02:55 PM
Well, I removed the flowmeter and it seemed as if it might have been somewhat stuck.....it seemed to turn more freely after I blew through it for a few seconds. Seems as if I read of such behavior in another thread. Checked it with a DMM with continuity beeper, and it appeared to be working properly from the electrical side of things.
I reinstalled it, and I'm 3 for 4 on diagnostic cycles. First one was fine, second one coded FH at the end of C:01, but the next two ran to completion with no problems.
I'll let it sit for the night and run another couple of diagnostic cycles in the morning.
My impression at this point is that I very likely do not have a CCU or MCU problem, because it does seem to run most of the time.
One slightly odd observation.....when I look at my pressure tube connector [EDIT: it's called that in the pdf manual, but shown as "airtrap" on an online parts diagram], the point where the small white plastic tube (onto which one pushes the black pressure tube) meets the rest of the connector molding seems to show a bit of stress.....it is whiter and more opaque than the rest of the assembly (which is uniformly translucent.) I don't know if anyone has ever seen one of those develop a small crack at that point, which would result in the same behavior as if the hose itself had a minute leak! When I had the connector assembly removed from the tub, I did blow through it, and there didn't seem to be any obvious leak at that point, though.
I'm a chemical engineer, and I have to admit that I am quite impressed with the elegant simplicity of the design of this washer--and the fact that it is rather easy to work on even for someone not accustomed to appliance repair.
Posted 26 April 2008 - 01:18 AM
When the diagnostic cycle ran fine, I didn't see a huge amount of water in the tub.
After letting it sit overnight, I'm back to getting the FH error code during the C:03 step, twice in a row. The hot water flowed for a longer time than it did during a successful cycle, and there is definitely more water visible in the tub than in a successful cycle.
So after possibly(?) unsticking the flowmeter last night, the diag cycles have always made it through C:01....so the flowmeter appears to work consistently at that point.
Does the hot water flow continue in C:03 until the pressure switch closes to indicate a normal water level, and if the pressure switch does not make in a set amount of time, it stops and displays the FH code?
Or....does the hot inlet valve open, and if the flowmeter does not totalize the proper amount of water within a given amount of time, or does not totalize the proper amount of water before the pressure switch makes to indicate a normal level in the tub, the flow stops and the FH code is displayed?
Posted 26 April 2008 - 05:20 AM
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Posted 26 April 2008 - 11:25 AM
Yesterday, on the first non-diagnostic trial cycle that I attempted with an empty tub--on the "delicate" setting--it filled more than 3 inches up on the door at one point before I opted to cancel out and drain/spin to clear it out.
Almost every time I got an FH on the diagnostic cycle at the end of C:01, the level in the tub appeared to be normal, though!
So all indications are that I have intermittent pressure switch issues, and replacing it will be a quick swap when the new one arrives.
Thanks again, Pegi!
Posted 10 May 2008 - 11:03 AM
Posted 10 May 2008 - 11:13 AM
Posted 10 May 2008 - 07:49 PM
When you're working with today's electronic circuit boards a changing resistance value instead of a properly closed switch could cause all kinds of malfunctions on the equipment you're working on.
I was a service manager that trained all of the new hire technicians for the commercial kitchen equipment installation and repair company I worked for until I was injured 10 years ago. Now I have to come to the Samurai's fabulous website for my appliance fix.
I hope my thoughts on your washer repair problem were accurate and helpful.
Posted 10 May 2008 - 11:40 PM
Posted 11 May 2008 - 01:11 AM
Thanks for the suggestions in any case.
Posted 15 October 2009 - 12:12 PM
found these posts today. i have the fh error. it occurs when the machine is filled up about three inches on the door as above. not in c1, but in c2 and any wash cycle.
i have already replaced the flow meter and the pressure switch. i had no trouble blowing thru the tube from the switch end, and it was not plugged at the entry point to the basket. there were no pinches in the tube.
from what i have read, there is very little left to change...
fill valve assy??
i'd be very grateful for an idea.
thanks in advance.
Posted 15 October 2009 - 01:58 PM
Posted 15 October 2009 - 03:17 PM
Thank you so much!
post-mortem of the tubing shows the spot where it was rubbing...
i'm very grateful.
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