Haier hlp21n does not working

Question edited for clarity.

My guess is that your drain hose is too high. The pump is in the base of the washer and pushes the water up the tube and into the drain/ when the pump stops, the residual water in the hose drops back into the base of the machine, so the higher the hose, the greater the column of water.

https://www.manualslib.com/manual/837407/Haier-Hlp21n.html?page=10#manual

Or

The Drain Pump is blocked or failing.

..

main suspects are lid switch or fill level gage lid switch

pressure sensor switch

This washer is a sanyo on the inside. When panasonic bought out sanyo and all its daughter brands, they started making parts not available for repairs. The service manual is here---> https://panasonic.encompass.com/shop/research_new/HAI/sm/HLP21N.pdf

Good luck!
This is also known as a sears proflex among other names....

I have a Haier HLP21N that had the same problem. Three blinking lights and refused to spin. It turns out the issue was the lid. The left side plastic hinge had broken the week before. What I didn't realize is that when the lid closes, that back hinge pushes up a rod which tells the machine that the lid is closed and it's safe to spin. So check that hinge and if it is broken you will either need to order a new lid or find some material to stuff under the hinge so that it stays up. I chose the latter option. Just know that going the DIY route means that your machine will continue to spin if you open the lid going forward!

Need more information.
Is the water turned on? Press the water level needed.
Low, Medium, Maximum press start

Try holding Pressing the maximum level button until it starts.

bad drain pump or clogged drain line. some units have drain trap you can clean,if so you can clean it out yourself but will make a huge mess if you don't pinch close the drain hose between the tub and pump.

Sorry for the very much delayed response due to site changes which modified the notification system.

Anyway, you should try holding first the WASH TEMP DOWN button then the POWER button until there's a beep. If it doesn't work, use WASH TEMP UP instead.

Make sure the Restart feature is turned on and the Recycle feature is turned off if all else fails. During the diagnostic mode use the WATER LEVEL DOWN button to turn RESTART on by pressing the said button until the LOW WATER LEVEL LED turns on. Use the WATER LEVEL UP button to turn RECYCLE off. The MEDIUM WATER LEVEL LED off indicates RECYCLE OFF. To set these modes in EEPROM the Advance button must be held while selecting Restart or Recycle. Power off the machine thereafter to complete the reset.

if on auto level select water level eg medium or low depending on amount of clothes this sometimes works dont use auto water level. If not check small pipe under touch board on top panel, make sure u unplug mains from plug pipe may be loose its small plastic goes to level sensor on right of board. If not level sensor faulty.