H06.61 on a Baxi HP60 / Baxi Assure HP55 High Temperature Monobloc ASHP: HP supply voltage The heat pump power supply voltage is out of range
Short answer
On a Baxi heat pump, H06.61 means: HP supply voltage The heat pump power supply voltage is out of range. The heat pump keeps running with some functions stopped. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: HP supply voltage The heat pump power supply voltage is out of range.
Part involved: power supply / PCB.
Likely causes:
- Check that the power supply input is in the available range. Switch off and on again several times in quick succession. The unit should remain off for more than 3 minutes before being switched back on. The part in the circuit on the main control board is faulty. Replace it with a new main PCB.
Is it safe?
| Does the heat pump stop? | Partly |
|---|---|
| Severity | Fault — clears by itself when the condition goes |
| Engineer needed? | Yes |
The heat pump keeps running with some functions stopped.
Resetting itself: yes - system restarts automatically when the cause disappears (may run in degraded/back-up mode meanwhile).
Manual reset: not required once cause removed.
What you can check
- Note the exact code shown on the controller and when it appeared.
- Check the heat pump's consumer-unit breaker / isolator is on (do not open any panels).
- The manual's user steps allow switching the system off and on once to see if the error clears; if the code returns, contact the installer.
- If the code persists or returns, contact a heat pump engineer.
What the engineer will check
- Check that the power supply input is in the available range. Switch off and on again several times in quick succession. The unit should remain off for more than 3 minutes before being switched back on. The part in the circuit on the main control board is faulty. Replace it with a new main PCB.
Who to ask for: heat pump engineer with electrical competence.
Certification: Qualified electrician / manufacturer-trained heat pump engineer; F-gas if refrigerant circuit is opened.
What you might notice
Sources
- Installation, user and service manual - Indoor unit ASHP Control ↗ · 7887625 - v04 - 22072025 · page 131 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026