Author Topic: Black stains on customer's wash  (Read 1256 times)

Online wildimaginations

  • Technician
  • Member Since: Jul 2011
  • Posts: 613
  • Country: us
Black stains on customer's wash
« on: January 10, 2012, 11:51:01 PM »
Customer was complaining of black stains on all of her wash.  Determined stains are not grease or residue from using too much detergent in her LG front load washer.  Disassembled supply water lines and found black residue on hot water filter screens.  Also found out that customer's water heater had failed.  Unable to find out what the black stains were but they did get through the filter screen into the wash.  Replaced water valve and advised customer to have plumber flush the lines after water heater repairs have been completed.




Appliance Service Technician
Authorized servicer on LG appliances.
About 45 mins east of San Francisco

Offline AJ

  • Technician
    Administrator
  • Member Since: Jun 2007
  • Posts: 9370
  • Country: us
    • ApplianceJunk.com - Appliance Repair
Re: Black stains on customer's wash
« Reply #1 on: January 11, 2012, 07:58:03 AM »
Interesting, wonder what that black stuff is.
Hope you find our site helpful.

Offline theoldstoveguy

  • Technician
  • Member Since: Jan 2008
  • Posts: 1277
  • Country: us
    • Buy me a beer through paypal
Re: Black stains on customer's wash
« Reply #2 on: January 11, 2012, 08:31:03 AM »
Iron algae looks like.At least that is what it looks like. Common in Northern CA.

Offline PARTech

  • Technician
  • Member Since: May 2009
  • Posts: 415
  • Country: us
    • Buy me a beer through paypal
    • Panhandle Appliance LLC
Re: Black stains on customer's wash
« Reply #3 on: January 11, 2012, 12:04:09 PM »
Think I may be calling a cust and going back out, I never thought of the water supply......
Serving North Idaho

Offline rego

  • Technician
  • Member Since: Apr 2011
  • Posts: 474
  • Country: us
  • Quality Service You Can Afford
    • Buy me a beer through paypal
    • Reges Service and Repair
Re: Black stains on customer's wash
« Reply #4 on: January 13, 2012, 06:30:22 PM »
I have done some water heater service work for a few year's and haven't run into any black particles only white from deteriating dip tube.

from www.mass.gov no idea if it helps but interesting.

Black Particles
 
Black particles can come from four common sources:
 The inside of a steel pipe,
 A broken water filter,
 A degrading faucet washer or gasket, or
 A disintegrating, black rubber, flexible supply line hose (these same hoses are also made as flexible water heater connectors).
 
Particles from the inside of a steel pipe are discussed in more detail under the brown or orange particles section.
 
If the particles are very hard, similar in size and shape, and might be described as large coffee grounds, they are probably granular activated carbon (GAC) from the inside of a GAC water filter. To stop this problem, replace the filter cartridge or consult with the manufacturer of the unit or the salesperson who sold it to you. If the particles are small black specks that might be described as being oily or sooty in texture, they are probably from the inside of a flexible hose. Over time, the chlorine or chloramine in the water causes the rubber to break down. To stop this problem replace the hose with one of the new styles that have a water disinfection resistant lining (clearly advertised on the label) or change to a different style of hose that is not made of black rubber.

Offline rego

  • Technician
  • Member Since: Apr 2011
  • Posts: 474
  • Country: us
  • Quality Service You Can Afford
    • Buy me a beer through paypal
    • Reges Service and Repair
Re: Black stains on customer's wash
« Reply #5 on: January 13, 2012, 06:36:59 PM »
Another interesting one:

Summary of Treatment Options for Iron and Manganese

Symptom                            Cause           Treatment

Water clear when drawn,            Dissolved iron or    Water softener (less than 5 mg/L of
reddish-brown or black particles   manganese.           iron)
appear as water stands; reddish-         Aeration (less than 25 mg/L of iron).
brown or black stains on fixtures         Oxidation/Filtration (less than 15
or laundry.                       mg/L of iron plus manganese).
                     Chlorination-Filtration (greater than
                     10 mg/L of iron).


 

Whirlpool makes noise at end of wash cycle

Started by brfiel

Replies: 6
Views: 2919
Last post September 22, 2007, 01:01:53 PM
by AJ
lint on clothes at end of wash. kenmore washer top load

Started by KMZK

Replies: 3
Views: 3334
Last post March 11, 2008, 10:59:49 PM
by BrntToast
washer won't wash

Started by poboi32

Replies: 1
Views: 1383
Last post March 17, 2008, 12:27:58 AM
by RegUS_PatOff
WM only leaks during wash cycle

Started by mpga1

Replies: 1
Views: 1772
Last post March 19, 2008, 04:21:56 PM
by Repair-man
Whirlpool Washer fills but will not wash

Started by printer1

Replies: 3
Views: 2000
Last post March 20, 2008, 01:45:30 PM
by RegUS_PatOff
Washer Issue - Runs, Fills, Start Wash...Loud Grinding for 60s, Drain, Spin Done

Started by Moose101

Replies: 16
Views: 7284
Last post April 30, 2008, 05:39:30 PM
by AJ