BoilerFaultCodes
Dimplex Boiler Fault Codes
60 fault codes across 5 Dimplex boiler models — explained in plain English.
Glen Dimplex gas condensing boilers.
Dimplex fault codes on this site
We document 60 fault codes across 5 Dimplex models, covering 25 distinct codes. Dimplex boilers use plain numeric codes such as 1, 4, 5. Codes for 4 of these models are taken directly from the manufacturer's own service or installation manual. Dimplex is a smaller name in the UK market, and if you own one this is likely one of the few places its fault codes are collected in one place.
Models covered: OV 32, System 30, System 18, OV 18, Combi.
Just want the most common Dimplex problems?
The top 8 faults across the whole Dimplex range — causes, DIY checks, repair costs.
High-severity Dimplex fault codes
No lightindication 1 4 5 6
Your boiler has lost all power, meaning it cannot produce heating or hot water because the electrical supply to the unit has failed.
OV 32
Your boiler has shut down because it has reached a dangerously high temperature to prevent damage to the internal components.
System 30
Your boiler is trying to start up but cannot light the gas flame needed to provide heat and hot water.
System 30
Your boiler has started to heat up but the flame has unexpectedly gone out, causing the system to shut down for safety.
System 30
Your boiler has shut down to protect itself because the water inside has become far too hot.
System 30
All models
5 Dimplex boiler models
Boiler cover options
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
Approved partner
Get a quote →
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Affiliate links. We may earn a commission at no extra cost to you.