Grant Aerona E05 fault code

What it means

Liquid pipe temperature sensor (T5) failure

The liquid pipe temperature sensor (t5) sensor reads open or short circuit.

Safety: Safe isolation before disconnecting sensors or working on the PCB.

UK models this code applies to

From the Grant service literature we hold (Grant Aerona 290 installation manual DOC0204 Rev 1.8, Table 11-1) — not a scraped list.

Now the harder half: proving what caused it

E05 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.

Free, no sign-up. Pick the model and follow Grant Aerona's own chart for it, one question at a time.