F73 Glow Worm
F73 Glow Worm Fault Cause?
You have been woken to a cold house, or a surprisingly cold shower. Your boiler shows F73. Your will have this fault on a range of Glowworm boilers, like betacom, ultracom and ultimates.
The cause of the fault can be due to a wiring issue, pcb or sensors.
Diagnose F73 Glow Worm
So you have F73 on your Glow Worm boiler. As engineers we will need to carry out the correct diagnostics to find the issue. ensure we have correct polarity. Check you wiring harness to the WPS. Does the WPS have 5dc earth to black, at 1 bar the WPS will have estimate 1-2dcV. Orange is our neutral. Check water pressure in the boiler.
Glow Worm diagnostic booking & deals
Head to our engineer line in the menu above, to arrange your free diagnostics visit. Provided the repair is assigned to us. You pay no diagnostic fee.
For deals on new boiler installation and Glowworm specific deals. You can request a quote via the form above or call us direct. Shannon construction & Heating Ltd are an approved accredited installer with Glowworm.