Swilson

Hello, Its a great time of year to have a problem with the boiler! We have an Alde Comfort 2928 which is about 15 years old, we have been on the boat for 2.5 years. Question 1: What maintenance routine should I be following with the boiler to make sure it is well maintained? Question 2: On the 23rd quite late at night I heard the boiler making a big gurgling sound and went to have a look and water had 'boiled over'. The reservoir with the pump attached was hotter to touch than what I remember of winters past. I checked the water level and it was just above minimum, I gave it a little top up (but with water rather than 50:50 antifreeze as I know now). What could be the possible causes of the problem? Anything other than these? And ate there other solutions to look for? - Antifreeze level too low? - Antifreeze too old - need to pump out old water and to refill with 50:50 - Faulty thermostat - needs replacing? - Faulty pump - need replacing? - Airlock in rads - bleed the whole system Question 3: Does the antifreeze keep the temperature of the liquid down and therefore stop it from boiling over? Or does it just stop the liquid from freezing in cold conditions? Many thanks in advance!