Rheem · Water Heater error code

A008Dry-fire protection

Single source Power off, standard tools

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Related diagnostic guides

Guide · Water Heater

Tankless: error code, no ignition at low flow, or temperature swings

Many tankless complaints are water-side: flow below the activation threshold, a clogged inlet screen, low-flow aerators, or scale in the heat exchanger. Gas supply, venting and combustion codes are blocked: diagnose and refer. Read the code first, then work the water side.

6 steps ~90 minmoderate

More Rheem water heater codes

Rheem · Water Heater

A129

Upper element / relay circuit problem

Single source High-voltage / caution