What does the Glow-worm Ultimate F70 fault code mean?
The F70 fault code on the Glow-worm Ultimate indicates a problem with the domestic hot water (DHW) pump. This error typically signifies that the pump is either malfunctioning or not receiving the necessary power to operate.
Common Causes
- Faulty DHW Pump: The pump may have failed due to wear and tear or internal damage, preventing it from circulating hot water.
- Electrical Issue: There could be a problem with the electrical supply to the pump, such as a blown fuse or wiring fault.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer for this issue, as it involves electrical components and potential gas safety risks. Attempting to fix it yourself could lead to further damage or safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the F70 fault code is around £250 to £350, primarily due to the cost of replacing the DHW pump and any necessary electrical repairs.