Ideal Heating Error Codes & Diagnostics
Complete diagnostic directory for official Ideal Heating fault codes. Verify root causes, safe troubleshooting steps, and replacement part numbers before calling a technician.
Ideal Logic F1 fault code: what low water pressure means
Ideal defines F1 as low water pressure in the sealed heating system, and the boiler stops until the pressure is raised. Ideal tells the owner to check the gauge reads between 1 and 1.5 bar and to repressurise with the filling loop if it is low, then to call a Gas Safe registered engineer if the pressure keeps dropping. Applies to: Ideal Logic, Logic Max, and Logic Plus boilers that display F1 This applies to Ideal Logic family boilers whose published fault guidance lists F1. Ideal uses L1 for a flow overheat or no-flow condition, which is a different branch, so read the exact characters on the display before acting. Owner-safe checks: With the boiler off and cool, read the pressure gauge and top up to about 1.5 bar with the filling loop only if it is below 1 bar. | After topping up, close both filling-loop valves fully and check whether the pressure holds over the next day of normal heating. Qualified technician: A pressure that will not hold, visible leaks or staining, an expansion vessel check, or an F1 that alternates with L1 needs a Gas Safe registered engineer.
Ideal F2: the flame was there and then it was not
Ideal uses F2 for a flame loss condition, which is a different event from a failure to establish flame at all. The burner lit, ran, and then the appliance stopped detecting combustion, so the investigation starts from what changed during operation rather than from what prevented ignition. Applies to: Ideal Logic and Vogue gas boilers using the F-series and L-series fault codes published by Ideal Heating Ideal publishes separate fault code lists for its Logic, Logic Max, and Vogue ranges, and the same character can carry different detail across them. Take the code from the display of the appliance in front of you and check it against the Ideal literature for that model rather than a general list. Owner-safe checks: Time how long the boiler runs before the fault appears, and note whether heating or hot water was actually produced. | Record which other gas appliances were in use each time the fault occurred. | Note whether failures happen on small demands, large demands, or both, since the pattern is diagnostic. Qualified technician: Measuring working gas pressure, testing the flame signal, and inspecting the flue and condensate arrangement are Gas Safe registered tasks. | If gas can be smelled, that single fact outranks the fault code entirely. Get everyone out, touch no switches, and telephone the emergency line for your supplier once you are outside.
Ideal L1 and L3: overheat and no water flow are not the same fault
Ideal publishes L1 as flow temperature overheat or no water flow and L3 as no water flow. For L1, Ideal says to open all radiator valves, confirm 1 to 1.5 bar, and reset. Its L3 guidance includes checking pressure and bleeding air from radiators. Record the exact code because the published wording and checks are not identical. Applies to: Ideal Logic and Logic Max boilers covered by the published fault code guidance These are Ideal Heating's published codes for its Logic and Logic Max ranges. Ideal also publishes an F-series in parallel, so an F1 on the same appliance is low pressure rather than an overheat. A letter and a number read from another manufacturer's boiler carries no relationship to these definitions. Owner-safe checks: Walk the house and open user-operated radiator valves and thermostatic heads; do not alter lockshield balancing valves. | Read the pressure gauge cold and top up to the 1 to 1.5 bar band Ideal names if it is low. | Bleed radiators that are cold at the top, then recheck the pressure afterwards. | Reset the boiler once after making a change, and observe a full heating cycle before deciding. | Note which radiators stay cold and where they are in the house before calling for service. Qualified technician: L1 or L3 returning after every valve is open, the pressure is correct, and the radiators have been bled. | An L5 code, which indicates the boiler has been reset too many times rather than diagnosing the original fault. | Any suspicion of a circulation pump fault or a blocked circuit, both of which need the casing opened. | Radiators that stay cold at the bottom, which points at debris in the system rather than at air. | Pressure that will not hold after topping up, which is a separate fault running alongside this one.
Ideal Logic Max L2 flame-loss lockout
On the documented Ideal Logic Max Combi, L2 is a flame-loss lockout. It records failure to establish or retain valid flame through the supervised sequence; it does not prove a dirty electrode. Gas pressure, valve command, spark, electrode and lead, condensate, flue, flame signal, and control require qualified tests. Applies to: Logic Max Combi boilers in manual 237660 A01 This L2 interpretation is limited to Logic Max Combi models covered by Ideal manual 237660 A01. Vogue, older Logic, Logic Air, and commercial Ideal appliances use their own fault tables. Owner-safe checks: Save L2, the model, other gas-appliance status, and audible startup sequence from outside the sealed case without forcing repeated ignition. Qualified technician: Gas pressure, valve, spark, electrode, flame-current, combustion, flue, condensate, wiring, and sealed-case work require a Gas Safe registered engineer.