Ariston Egis Fault Codes
The Ariston Egis — Egis Plus and related compact models — is the brand's budget UK combi: small, simple and keenly priced, sold in volume into flats and rental stock. It uses the same three-digit code families as its dearer siblings — 101 overheat, 108 low pressure, 501 no flame, 3xx electronics, 6xx flue — on a simpler display. Egis boilers often live hard lives in rented properties with irregular servicing, and their fault statistics show it: the codes below skew toward the preventable. For owners and landlords the economics are those of any budget boiler — repairs are individually cheap, and the honest replace-versus-repair conversation arrives earlier than on premium ranges. Each code links to its full page.
Where Egis fault codes appear
The Egis shows its three-digit fault code on a compact display when tripped. Note it exactly; on the simplest fascias the code may flash or alternate with other information, and the three digits are the part that matters.
Resetting a Ariston Egis
Press the reset button briefly to clear and retry; 108 wants the system topped up to about 1–1.5 bar first. A 501 that returns after one reset means checking gas supply and (in winter) the condensate pipe, then booking a Gas Safe engineer — never serial resets.
Common Egis problems
Egis callouts concentrate on 108 pressure loss (small, often-neglected systems), 501 ignition lockouts — condensate freezes and electrode wear in the usual proportions — and overheat/circulation codes where sludge has never been addressed. An annual service transforms this boiler's reliability record; its absence writes most of the entries on this page.
Most common Egis fault codes
- 501 Fault code 501 on an Ariston boiler means the boiler attempted to light the burner but… Read more →
- 108 Fault code 108 on an Ariston boiler indicates that the water pressure inside the central… Read more →
- 101 Fault code 101 on an Ariston boiler indicates that the central heating circuit has… Read more →
- 104 Ariston fault code 104 is a safety lockout triggered when the boiler detects that water… Read more →