F37 Errors What & How to Fix

For those that have purchased Maytag MHN33 washers in the past few years, you may have noticed a F37 error code that pops up on your screen. This error isn't listed in the programming manual or the troubleshooting manual you receive for the machine.
What is a F37 error code and how do you fix it?

HOW DO YOU FIX IT

The long term fix for this error code is a software update that should have been installed at the factory or by your distributor before installing. Some machines may not have any errors pop up from months or years and in that case you need to have a service tech come and update the software on your machine(s).

In the short term you can try clearing the error by either:
1. going into the service menu and trying the P-1 setting and clearing the error

2. go into P-1 to clear the error and then unplug the washer for at least five minutes before plugging machine back in

WHAT DOES F37 MEAN?

According to service techs I have spoken with here is what F37 means depending on the machine you have: 

37	SPEED ERROR, MOTOR RUNNING TOO FAST,COULD BE OPTIC SENSOR AT FAULT or PRESSURE SWITCH OUT OF RANGE

According to a Maytag Service bulletin from July 2021 here is some more information on what the service tech should do to clear the code from happening again:

Ev
A Heck of A Nice Guy

TOPIC

Maytag has released new software that addresses some machine performance issues, while also adding some

enhancements that will improve the overall machine performance.
Some of the benefits include:

•Stuck button error removal (washer) + extending the time before triggering error from 10 to 20 secs (dryer)

•New F27 + F21 error behavior to improve suds detection and removal before triggering an error (washer)

•New F37 + F38 error codes that specifically indicate if the pressure switch is out of range (washer)

•Auto clearing error codes F21, F27, F37, F38 after problem conditions are no longer present

•And several additional changes

ACTION REQUIRED

In order to benefit from the new software, each machine must be updated following the instructions provided in this field service bulletin

IMPACT 

This issue impacts the following Maytag machines:

OVERVIEW OF INSTRUCTIONS

REQUIRED TOOLS/EQUIPMENT

For the MHN33 + MAT20:

ACP Cyclone programming device

Large programming cable for CCU

Small programming cable for UI

Extension cord (if needed to power ACP Cyclone programming device)

MODEL AFFECTED SERIAL NUMBERS

MHN33

CX10-CX52, CA01-CA26

MAT20

C944-C952, CX01-CX52, CA01-CA52

MHN33 ––TECHNICIAN INSTRUCTIONSTECHNICIAN INSTRUCTIONS

INSTALLING MAYTAG SOFTWARE UPDATES

HOW TO UPDATE SOFTWARE ON CCU + UI BOARDS

1. Put machine into service mode

2. Access help code sub menu (see reference chart for detailed instructions) and record record
SC, EC, SU, EUSC, EC, SU, EU codes

3. Unplug machine power cord from outlet

4.Remove control panel and lift uplift up the top panel to access the CCU

5.Plug cable into CCU port FP8 (port closest to front of machine)

6.Plug cable into port labeled C on ACP Cyclone programming unit

7.Plug power cable into ACP Cyclone programming unit, then tap on Menu button on touchscreen

8. (on the service bullten copied here there is no step 8)

9. Tap on Select Programming Image

10.Tap on  MAT4_HMAXMTG_W11511340_V6.0.0.sap

11.Press Press StartStartbutton on lower left corner of device

✓If If successful successful ––GREEN success light will illuminate

!If unsuccessful ––RED error light will error light will illuminate, and display ERR$00000007.
Check connections on the communication cable. Reset programmer by pushing in black reset button on the bottom of programmer

12.Press reset button on bottom edge of cyclone to prepare for next update

13.Remove power cable from ACP Cyclone programming unit

14.Plug smallest cable into UI port J1(next to capacitor on board) ––be sure to have be sure to have red edge facing the green ribbon cable

15. Plug smallest cable into port labeled A1 on ACP Cyclone programming unit

16.Plug power cable into ACP Cyclone programming unit, tap on Menu button

17.Tap on Select Programming Image

18.Tap on HMAXNARCLASSB_UI_W11511340_4.0.0.sap

19.Press Start button on lower left corner of device (see success light details above)

20.Press reset button on bottom edge of cyclone to prepare for next update

21.Remove power cable from ACP Cyclone programming unit and remove communication cable from machine control board

22.Reassemble machine, then restore power to machine

23.Access help code sub menu to ensure updates were successful:

•SCSCcode now shows code now shows SC.06

•SUSUcode now shows code now shows SU.04

24. IMPORTANT NOTE --Machine programming has been reset to factory settings

NEED SUPPORT?

Call Maytag technical support line: 269-759--6044