On the basis that you now are worried about the gas safety of your boiler I would suggest getting a Gas Safe technician to carry out a Landlord's Gas Safety Inspection.
This is a legally required safety inspection if you are letting your property so woukd be seen as a safe bill of health, assuming it passes of course. If it doesn't pass you can then set about getting the necessary remedial work done by the inspector or others.
This is a legally required safety inspection if you are letting your property so woukd be seen as a safe bill of health, assuming it passes of course. If it doesn't pass you can then set about getting the necessary remedial work done by the inspector or others.