HWH error code LED OFF 15 16
Control-box pump-relay LEDs 15 (PUMP COIL) and/or 16 (PUMP OUTPUT) not lit when commanded - check fuse F8: F8 OK points at the control box, F8 blown points at the 8600 pump-relay wire or the pump relay.
What to check, and in what order, is in the app. The flow HWH 625 / 625S / 725 — leveling code & indicator lookup walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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- HWH625.txt
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