A.O. Smith

What every A.O. Smith gas water heater flash count means, with links to full guides where we’ve verified the fix.

A.O. Smith’s hybrid heat pump water heaters (Voltex and newer models) show numeric error codes on the control panel. Here’s what’s confirmed so far.

Four flashes on an A.O. Smith gas water heater means High-Temperature Shutdown. Here’s the reset procedure and when it means a real problem.