Reclaim fault code F1
Comms error tank ↔ heat pump.
What F1 actually means
The tank controller and the outdoor heat pump have lost communication. The tank knows it wants hot water; the heat pump is not hearing about it.
What causes it
- Damaged comms cable between the outdoor unit and the tank, which on a split install can be a long run
- Water in a junction or terminal
- A loose terminal at either end
- Controller fault, which is the least common
Most likely first. That order is from what we actually find on site, not from the manual.
Safe to check yourself
No tools, no covers off, nothing to do with gas, refrigerant or wiring.
- Look along the visible run of cable between the outdoor unit and the tank for obvious damage
- Check nothing has been dug up, whipper-snipped or nailed through recently
What we check on site
So you know what you’re paying for.
- Continuity test on the comms run
- Terminal inspection at both ends for water and corrosion
- Controller diagnostics
- Check the run length is within Reclaim's spec, which matters on a long split
Can you keep using it?
You will have hot water for as long as the tank stays hot, then you will not, because the heat pump is not being told to run. It is not dangerous, just a countdown.
What the fix usually involves
Usually a cable or a terminal, fixed on the first visit. Controllers carry ten years on the Reclaim unit, so a genuine controller failure inside that window is a warranty claim.
Is it worth fixing?
That depends almost entirely on how old the unit is. Past about ten years on hot water and gas heating, and twelve on aircon, a significant repair usually costs more per remaining year than a replacement does — and it’s the same point at which the VEU rebate is worth the most, because old inefficient appliances are exactly what the scheme pays to remove. If yours is young and the fault is a component, we’ll fix it and say so.
Repair or replace? The 10-year rule, and what the rebate is worth →