Panasonic Aquarea H70 fault code
Panasonic Aquarea heat pumps
What it means
Backup heater overload protection (OLP)
The backup heater's overload protection has tripped. H91 is the same for the tank heater.
Safety: Safe isolation before working on heater circuits.
UK models this code applies to
From the Panasonic service literature we hold (Panasonic Aquarea installation guide 1.2 (Monobloc H & J generation, ProClub UK) — Error Codes during commissioning) — not a scraped list.
Now the harder half: proving what caused it
H70 names a symptom, not a root cause. In the app, the same code opens a guided investigation: what to measure first, the expected values for your exact model, and an honest verdict — including “nothing in this machine is broken” when that's what the readings say.
Chase H70 on your machine →Free, no sign-up. Pick the model and follow Panasonic Aquarea's own chart for it, one question at a time.
Or watch one get chased — free demo →