E21 means it thinks there is a blockage in the circulation pump 12008381. I’d check that for any obvious debris or damage 1st.
https://www.appliancepartspros.com/bosch-heat-pump-12008381-ap5984938.html
E21 means it thinks there is a blockage in the circulation pump 12008381. I’d check that for any obvious debris or damage 1st.
https://www.appliancepartspros.com/bosch-heat-pump-12008381-ap5984938.html