Baxi Quinta Ace fault H.01.21
Dhw temp GradLevel3
ApplianceWhat it means
Maximum DHW Temperature Gradient Level3 Exceeded - the flow temperature has risen too fast
Likely causes
- Flow/circulation issue
- Pump malfunction
Where to start
- Check the flow (direction, pump, valves)
- Check that the pump is operating correctly
The full answer, free
- How to put it right, step by step
- The manual page for this fault (page 77), right under the answer
Safety: Isolate gas and power before you open the case. If you have been into the gas side, do a tightness test, and a combustion and flue check before you hand back. Gas Safe (UK) or RGI (Ireland) work only.
From the Baxi manual for the Quinta Ace. Check the model on the data plate before you order parts.
Other Baxi Quinta Ace fault codes
- A.00.34TOutdoor missing
- A.01.23Poor combustion
- E.00.04TReturn open
- E.00.05TReturn closed
- E.00.06TReturn missing
- E.00.08THeat ex open
- E.00.09THeat ex closed
- E.00.20TFlue gas open
- E.00.21TFlue gas closed
- E.01.045x flame loss error
- E.01.12Return higher flow
- E.01.24Combustion error
- E.02.13Blocking input
- E.04.01TFlow closed
- E.04.04TFlue closed
- E.04.05TFlue open
- E.04.06Max flue temp
- E.04.08Safety input
- E.04.10Unsuccessful start
- E.04.12False flame
- E.04.13Fan
- E.04.15FlueGas pipe blocked
- H.00.81RoomTempMissing
- H.01.05Max delta TF-TR