BoilerFaultCodes 09
Gas valve connection cable fault
Potterton ASSURE 30 COMBI LPG Fault codes & diagnostics
22 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Combi Gas 2018-present
GC Number 47-393-69
Download the Potterton ASSURE 30 COMBI LPG manual
PDF
Versions & GC numbers
The fault code is already on your display
Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →
Severity at a glance
Each cell = one fault code. Hover to identify. 22 Unrated
Which version do you have?
The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.
| GC number | Appliance (register name) | Produced |
|---|---|---|
| 47-393-69 | ASSURE 30 COMBI LPG 30 | 2018–present |
Appliance names and production years are taken from the UK Product Characteristics Database (the SAP/SEDBUK register). Where a GC number is also printed in this model's own manufacturer manual, both sources were checked to agree.
Just want the most common Potterton ASSURE 30 COMBI LPG faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes
All 22 documented codes
Tap any card for details
15
PCB connection fault
20
possible faulty components
28
possible faulty components
40
possible faulty components
103
Errors related to the optional Safety Assist accessory
104
Errors related to the optional Safety Assist accessory
107
Errors related to the optional Safety Assist accessory
109
Flame failure
110
overheat of the primary system water
Showing 11–20 of 22
118
primary water pressure is less than 0.5 bar
125
Primary water temperature has not changed by 1°C within 15 to 30 seconds of burner lighting OR primary water temperature twice exceeds selected temperature by 30° within 10 minutes
128
flame failure during normal operation
130
NTC flue sensor fault
133
gas supply has been interrupted, ignition has failed or the flame has not been detected
134
gas supply has been interrupted, ignition has failed or the flame has not been detected
135
gas supply has been interrupted, ignition has failed or the flame has not been detected
160
possible faulty components
321
possible faulty components
384
Central heating PCB fault
Showing 21–22 of 22
Bat
Errors related to the optional Safety Assist accessory
H
Safety thermostat operated or faulty
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