Alpha FE97 Fault Code: Causes, Fixes & Repair Costs
What does the Alpha FE97 fault code mean?
The Alpha FE97 code — most likely a display variant of the E96 or E97 fault family — indicates that the boiler has detected a problem with its fan, flue, or internal electronics. The fan is a safety-critical component: it pushes combustion gases out through the flue and out of your home. If the boiler's control board cannot confirm the fan is running correctly, it will lock out and refuse to fire. An E97-type reading can also point to an internal electronics or communication fault, such as a control board issue or a connected component failing to respond. Note: if your display shows exactly "FE97", cross-check with your specific Alpha model manual (E-Tec, InTec, Evoke, or CD series) or contact Alpha Innovation directly, as code labelling can vary across the range. The underlying causes and fixes described here apply across the E96/E97 fault family.
General guidance only — not a substitute for professional advice, and not certified by a Gas Safe engineer. Always have your specific appliance assessed by a qualified professional. Any gas work must be carried out by a Gas Safe registered engineer. If you smell gas or suspect carbon monoxide, leave the property and call the National Gas Emergency line on 0800 111 999.
Common causes
- Faulty or failing fan motor Common
The fan motor's windings can burn out over time, or the bearings can deteriorate, causing the fan to spin too slowly or not at all. The boiler's PCB monitors fan speed and will lock out if it falls below the required threshold. This is the most common trigger for an E96-family fault.
- Debris or dust reducing fan speed Common
Dust ingress or physical debris can clog the fan blades and slow them below the minimum RPM the boiler expects. This is particularly common in loft-installed boilers, which are more exposed to attic dust and particulates.
- Flue blockage Sometimes
A partial or full blockage at the flue terminal — caused by a bird nest, leaves, or ice in cold weather — can prevent adequate gas extraction. The boiler detects back-pressure or abnormal airflow and shuts down as a precaution.
- Loose or damaged wiring to the fan Sometimes
Vibration from normal boiler operation can gradually loosen the electrical connections between the fan and the PCB. A broken or corroded connector can cause intermittent or persistent fault codes even when the fan itself is mechanically sound.
- PCB or control board fault Rare
If the control board itself is failing, it may incorrectly read fan speed signals, fail to send the correct start signal to the fan, or throw fault codes for components that are actually functioning normally. PCB faults are typically confirmed only after other causes have been ruled out.
How to fix it
- Attempt a single boiler reset DIY safe
Locate the reset button on your Alpha boiler's control panel. Switch the boiler off and wait five minutes, then press and hold the reset button for approximately five seconds until the display changes. Allow the boiler a couple of minutes to attempt a restart. If the FE97/E96 fault returns immediately or after a short while, do not reset again — repeated resets without fixing the root cause can cause further damage. Move on to the next step.
- Check the external flue terminal for obstructions DIY safe
With the boiler switched off, go outside and visually inspect the flue outlet — usually a white pipe on an external wall or through a roof. Look for obvious blockages such as bird nests, accumulated leaves, ice, or physical damage to the terminal cover. Do not insert anything into the flue; if you spot a blockage you cannot safely clear from outside (e.g., a nest inside the pipe), this must be dealt with by a Gas Safe engineer.
- Check your gas supply is live DIY safe
Confirm that other gas appliances in your home (cooker, gas hob) are working normally. If they are not, contact your gas supplier — there may be a supply interruption in your area, which would explain the boiler fault. Do not attempt to work on any gas pipework yourself.
- Call a Gas Safe registered engineer to inspect the fan Gas Safe engineer
An engineer can access the boiler's internal diagnostics to read the actual fan speed output and compare it against the required value. They will clean the fan blades as a first step, and if the motor is seized or its windings are damaged, they will replace the fan assembly with a model-specific Alpha part. In some cases only the motor itself needs replacing, which is more cost-effective than a full fan assembly swap.
- Engineer to inspect internal wiring and connections Gas Safe engineer
A Gas Safe engineer will systematically check the wiring loom between the fan and the PCB — looking for corrosion, detached connectors, or damaged insulation. Connections will be re-secured or replaced as needed, and a continuity test carried out to confirm the circuit is sound before the boiler is restarted.
- Engineer to test or replace the PCB if other causes are ruled out Gas Safe engineer
If the fan, flue, and wiring all check out correctly but the fault persists, the control board (PCB) is the likely culprit. The engineer will test PCB outputs and, if the board is found to be faulty, replace it with the correct Alpha part for your model. PCB replacement is a last resort given the cost involved.
Parts you may need
- Alpha boiler fan assembly (model-specific) · from £140
- Fan motor (motor-only replacement where applicable) · from £75
- PCB / control board · from £220
- Flue terminal/terminal guard · from £25
- Fan wiring harness/connector · from £30
The exact spare depends on your boiler's GC number (on the data badge). Check this against the part before buying.
Typical repair cost
Expect to pay roughly £225–£400, depending on the underlying cause.
Frequently asked questions
Is FE97 definitely the same as the Alpha E96 fault code?
Not definitively — "FE97" is not listed in widely published Alpha fault code databases, whereas E96 is a confirmed code covering fan and flue faults. The most likely explanations are either that FE97 is a model-specific variant not documented publicly, or that the display is showing E96 (or a similar code) and a digit is being misread. Check your boiler's manual for your exact model (E-Tec, InTec, Evoke, etc.) or call Alpha Innovation's support line with your model number and serial number to get a confirmed diagnosis before any work is carried out.
Can I fix an Alpha FE97/E96 fault myself?
The only safe DIY steps are a single reset and a visual check of the external flue terminal for obvious obstructions. Everything beyond that — removing the boiler casing, inspecting the fan, testing wiring, or replacing any component — must be done by a Gas Safe registered engineer. Working on a boiler's internal components without Gas Safe registration is illegal and potentially dangerous.
How much will it cost to fix an Alpha E96/FE97 fan fault?
For most homeowners the all-in cost — callout, labour, and the fan part — falls between £225 and £400. Callout fees alone are typically £100–£150, with labour running at £60–£100 per hour. If only the fan motor needs replacing rather than the full assembly, costs sit towards the lower end of that range. If the PCB is found to be faulty, repair costs can rise to £350–£600 depending on complexity, though PCB faults are less common. If your boiler is older and a repair quote is approaching £400 or more, it is worth getting a new boiler quote for comparison.
How do I stop this fault from coming back?
The best prevention is an annual boiler service by a Gas Safe engineer. During a service, the engineer will clean the fan blades, check all electrical connections, inspect the flue terminal, and spot early signs of wear before they cause a breakdown. Regular servicing is also a condition of most Alpha boiler warranties — skipping a service can invalidate your cover.