Perhaps the installer has encouraged you to take out a sweeping / service contract. There’s nothing wrong that in principle but again, if they have said you HAVE to use their company, that’s not legal.
A professional sweep is the best person to cover the service and maintenance tasks required to maintain guarantees on a woodburner installation. There are lots of small checks and observations to go through, and a professional sweep will cover most of these as part of the sweeping process. There may be other conditions of the guarantee like fuel type and usage, and your sweep can answer any questions.
Your local professional sweep may also offer extra value for money in terms of impartial (usually) advice and guidance on fuels, appliance operation etc. Good advice can be invaluable, helping you to save money and keep your fire working efficiently. See Burnright.
If you are currently using a company who said you HAD to use them for sweep and service to maintain guarantees, then they have misinformed you and perhaps it’s time to look elsewhere. You may well get better value for money and perhaps a better service.
Find professional sweeps near you: https://https://www.findachimneysweep.co.uk/
