The fan makes a noise, but the bathroom stays wet after a shower. Is the motor failing, or is the air struggling to leave the room?
A fan problem needs the whole ventilation route considered. Buying a more powerful replacement before checking the duct and controls can leave the original problem unresolved.
Describe what has changed
Tell us whether the fan is completely silent, intermittently working, unusually noisy or running without clearing moisture. Mention whether it used to perform better and whether the problem followed decorating or loft work.
If there is a burning smell, visible damage or signs of overheating, stop using it and seek advice. Do not tap the fan to make it start or remove its cover to inspect electrical parts.
Air needs a route in and out
An extractor removes air, which needs replacing from elsewhere. A restricted air path into the room can affect performance. The duct route and outside terminal also need to allow air to escape properly.
Long runs, unsuitable bends, crushed ducting or an obstruction may reduce airflow. A fan spinning freely is not proof that the system is extracting effectively. Assessment should consider the installation rather than just its sound.
Check the controls and supply
Timers, humidity controls and switching can cause confusing behaviour if they are faulty or set inappropriately. Some fans are designed to run continuously at low speed, so continuous operation is not automatically a fault.
If the fan trips a protective device or other equipment is affected, electrical fault finding may be required. A new fan should not be used as a substitute for investigating a supply or wiring problem.
Decide whether repair is practical
Repair depends on the diagnosis, parts availability and the condition of the equipment. There is no useful universal rule that every fan under five years old should be repaired or every older fan replaced.
An extractor fan replacement may make sense if the unit is damaged, unsuitable or uneconomic to repair. The new model must suit the duct route, controls, supply and bathroom location. Matching the front grille size is not enough.
Keep the moisture problem in perspective
Persistent damp can involve ventilation, heating, insulation, leaks or several factors together. A fan replacement cannot repair a roof leak or guarantee that mould elsewhere in the home will disappear.
Where symptoms affect several rooms, a broader ventilation assessment may be useful. Positive input ventilation is one possible system to assess, rather than an automatic next purchase whenever a bathroom fan underperforms.
Prepare a useful enquiry
Send a photograph of the fan in place, the room and any outside outlet visible safely from the ground. Include the model if available without dismantling anything. Tell us whether the route passes through a wall, ceiling or loft, if known.
We can then discuss the assessment and likely scope. Roof works are not included. The aim is suitable extraction with clear operating instructions, rather than merely replacing a noisy box with a quieter one.
Frequently asked questions
The fan spins. Does that mean it works properly?
No. A restricted duct or air supply can reduce extraction even with a running motor. The complete airflow route needs consideration.
Should a bathroom fan run continuously?
Some models are designed for continuous low-speed operation. Check the model and controls before treating that behaviour as a fault.
Can a new fan cure all bathroom mould?
It may help where inadequate extraction contributes to condensation. Leaks, cold surfaces and other building issues may also need attention.
Do you include roof repairs or roof access work?
Roof works are not included. If the outlet or building condition requires a roofing specialist, that needs a separate arrangement.
Discuss the next step
If you need help with this problem in Southampton or the surrounding area, send us your postcode, a short description of the symptoms and photos taken from a safe position. We can discuss the appropriate next step.
