Error code 88 - Stiebel Eltron Water Heaters

Here is a link to all the Noritz error codes. There is NO Code 67. https://inspectapedia.com/heat/Noritz-NCC199-Error-Codes.pdf

F51 error code is a motor rotor position sensor failure or a lower harness problem. You need to check the motor in manual test mode, not automatic test mode. This will check the hall sensors and do a spin test: Be sure the washer is in standby mode (plugged in with all indicators off; or with only the Clothes Clean or Done indicator on). Select any one button (except POWER, START, STOP, and PAUSE/CANCEL) and follow the steps below, using the same button: Press/hold 3 seconds. Release for 3 seconds. Press/hold 3 seconds. Release for 3 seconds. Press/hold 3 seconds.

If this test mode has been entered successfully, all indicators on the console are illuminated for 5 seconds with 88 showing in the Estimated Time Remaining two-digit display. During the 5 second wait time with 88 showing in the display, press the same button once. You should be in manual test mode. If the button is not pressed within 5 seconds, the automatic test mode begins. The Rotor Position Sensor uses Wash, Rinse, and Spin indicators to detect the three hall sensors. Console can have up to two of these indicators on at the same time when the tub is not moving. Open the lid and rotate the basket by hand. The Wash, Rinse, and Spin indicators should toggle on and off according to the direction the tub is being turned.

SPIN TEST: Make sure lid is down. Press and release: 2nd RINSE or EXTRA RINSE. The lid locks and the lid lock indicator turns on. Press and release; SPIN SPEED, WATER LEVEL, or LOAD SIZE. The motor/basket spins at 23 rpm. Press again, motor /basket spins at 530 rpm. Press again, motor/basket spins at 950 rpm. Press again and motor turns off.

From:
http://www.applianceblog.com/mainforums/threads/32879-Whirlpool-Cabrio-UL-F51-Error-Codes

may have a screwed up washer seal on the hot side..it will stop the flow to a degree and allow more cold water in..calls for dismantling the entire control or replacing it..

1) Copy following links for Rheem tankless error codes
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/Tankless-Error-code-13.pdf

2) Maintain water heater as shown in product manual to avoid common error codes.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Error code 36 does not show in Rheem tankless manuals.

Copy following link for general troubleshoot and error codes, and Rheem contact information:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error code 36 does not show in any resource, including 2008 service manual, or 2012 product manual.
Check that remote control display is illustrating the correct number.
For example there is error code 35.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

From the manual:



PROGRAMMABLE KEYPAD LOCK
To prevent tampering with any of your settings or
temperatures, the front panel buttons and the rotary dial can
be locked out, requiring a four digit code to unlock them.
You may use either the default lock code of "0000", or your
own personal number combination (see "Changing The Lock
Code")


LOCKING THE THERMOSTAT: Ensure the rotary dial is in the
RUN position. Press the NEXT button for at least 2 seconds.
The words "ENTER CODE" will appear on the screen, along
with "0000". Press the NEXT button again for at least 2
seconds. A padlock should appear on the screen to confirm
that the thermostat is now locked.


LOCKING THE THERMOSTAT: Ensure the rotary dial is in the
RUN position. Press the NEXT button for at least 2 seconds.
The words "ENTER CODE" will appear on the screen, along
with "0000". Press the NEXT button again for at least 2
seconds. A padlock should appear on the screen to confirm
that the thermostat is now locked.

UNLOCKING THE THERMOSTAT: Ensure the rotary dial is in
the RUN position. A single press of any button should cause
the words "ENTER CODE" to appear on the screen, along
with "0000". If the default code was used to lock the
thermostat, press the NEXT button for at least 2 seconds.
The padlock should disappear from the screen, and the
thermostat should now be unlocked.
If you try to unlock the thermostat by entering a code that is
not correct, a padlock and the digits "88:88" will flash on the
screen and you will have to try again. If a lock code
different from the default was used, this will need to be
entered by using the UP/DOWN buttons, and the NEXT
button to advance to the next digit. Once the correct code is
entered, press the NEXT button for at least 2 seconds and
the thermostat should now be unlocked.


CHANGING THE LOCK CODE: To create your own specific
lock code, first ensure that the rotary dial is in the RUN
position. Press the NEXT button for at least 2 seconds. The
words "ENTER CODE" will appear on the screen, along with
"0000". Now press the HOLD button again for at least 2
seconds. The words "SET CODE" will appear on the screen,
along with "0000".

IF YOU FORGOT YOUR LOCK CODE: You can still unlock the
thermostat by performing the following steps: On the back
of thermostat locate JP1, which is a row of 3 metal pins at
the right edge of the circuit board above the battery tray.
There should be a plastic jumper cap on 2 of the 3 pins
(right or left).


Move the jumper cap so that it is on the opposite 2 pins.
For this change to be recognized, move the Temperature
Mode switch to any other position than its current one.
These steps listed should have changed the lock code back
to the default of "0000". Follow the instructions already
listed in "UNLOCKING THE THERMOSTAT".

Before calling service technician who has service manual and can test which part has failed, open following links for troubleshooting resources including steps below and phone number for Bosch:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/2400ETechSupport/Troubleshooting/tabid/1131/Default.aspx

Clean inlet filter
Check all faucets for clear pathway
This unit does not work with preheated water (solar assisted)
Incoming water above 70 degrees, avoid restricted faucets
Check that both temperature sensors are making contact and firmly mounted on respective cold and hot pipes.
Descale heat exchanger
http://www.boschhotwater.com/Portals/7/TechBulletins/TWH-G2-13_Descaling.pdf

Before calling service tech, open following links for Rheem troubleshoot resources including rheem chat, error codes, possible maintenance and service manual.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error codes are considered start-point for troubleshooting.
Multiple error codes can mean PC board failure.
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf
http://waterheatertimer.org/pdf/Error-code-13.pdf
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf

Error codes F1 and F2 do not show among common error codes.
Call Bosch 1-800-642-3111

Before calling service technician, open following links for Bosch troubleshoot resources:
Error codes are considered start-point for troubleshoot.
Multiple error codes can indicate PC board failure.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/250SXOTechSupport/Troubleshoot/tabid/569/Default.aspx
http://forms.boschhotwater.com/Home/BoschTechSupportForm/tabid/614/Default.aspx
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/250SXOTechSupport/ServiceBulletins/tabid/573/Default.aspx