Samsung Top Load WA48H7400AW/A2 No Hot Water

[CLTMike]

Model Number

WA48H7400AW/A2

Brand

Samsung

Age

6-10 years

Hello - We've been having issues with our Top Load Samsung Washer - WA48H7400AW/A2. I've done a ton of research here, but after trying everything suggested we're still having issues. Basically we're not getting Hot water into the machine even though shoes are correct, no kinks. etc.

We've replaced the Valve assembly, Washer Control Board and Heater Control Board.

Tin testing, The voltage on the end of the plugs comes to 80 or so just like the others when off. When power goes to the others when going though the test cycles (Cold, etc) that measures 120v for those valves but not for Hot / Warm. When on the last test Cycle (All / Rinse) it does get 120v

We had another issue with the valve not closing at all even after turning off the machine but that seems to be fixed now after the valve replacement.

To see if there was a blockage or something I switched the Cold and Warm plugs on the valves to see if Warm water would come out when Cold was selected, and sure enough it did.

Sincere thanks to anyone who can help solve this!

 

[Jake]

Did you check the water temperature thermistor for a loose connection or broken wire?

Here's the thermistor for your model:
Water Temperature Thermistor DC90-10128N


This video shows how to access it:

I'm attaching the service manual below, Page 27 relates to that thermistor.

Jake

 

[CLTMike]

Thanks Jake. I really appreciate the reply. We just check this as well. Bought the replacement and still having the same problem. Only time we get Hot water is on the last setting in test mode (Cold and Hot are lit). Likewise, that the only time the hot lead gets the 120V of current.

Any other thoughts?

Mike

 

[Jake]

Then it has to be a shorted or broken wire from the control board to the water inlet valve.

 

[CLTMike]

Thank you. Makes sense. Can the whole wiring harness etc be replaced? Is that what you recommend?

 

[Jake]

You don't need to replace the entire wire harness, just check all the wires and wire connections to make sure none are frayed, shorted, or broken.

Look on your model number tag for a revision number as well.