AO Smith ATI 540H tankless

AO Smith ATI 540H tankless

by Melissa Lovitch
(Whiteford, MD, USA)

My AO Smith tankless water heater, model #ATI 540H 101 was purchased and installed by professionals a year ago. For the 2nd time in a year I am without hot water; this time for 3 days and counting. Just spoke with my plumber again and he says the troubleshooting guide for my unit is in Japanese and has not yet been translated into English, marvelous.

This is not a cheap unit and I am very frustrated as there is no end in site. Excuse me while I go bathe in the pool.

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water heaters