Bosch 2400ES NG Review: Bosch 2400ES NG AquaStar 6.4 GPM Indoor Tankless Natural Gas Water Heater. This unit was cheap to buy, terrifically expensive to install and has never operated reliably. Problems began on install and never ended. We finally solved one code problem that was causing the unit to shut off and give error code E3 - cold water sensor. Fixed that after a few hours with tech support. Oh, and tech support runs just like my heater - hot and cold. Great help one day. Then another day was on hold so long my daughter had a birthday. ... Read more »
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