I searched for that error number 903 using https://www.google.com and saw several fraudulent sites, so beware.
There is a similar error number 90 mentioned several places, but that error requires a technician to repair it as it may be dangerous to do it yourself.
Noritz in the United States has a search feature to find a technician if you need one.
Answers & Comments
I searched for that error number 903 using https://www.google.com and saw several fraudulent sites, so beware.
There is a similar error number 90 mentioned several places, but that error requires a technician to repair it as it may be dangerous to do it yourself.
Noritz in the United States has a search feature to find a technician if you need one.
https://www.noritz.com/home-owners/find-a-servicer/