I have a four year old gas boiler that has been working great. I rent and the last time it was cleaned was about 2 years ago.Last night there was a loud squealing sound coming from the boiler, I checked it and there was a red light on the Taco zone valve control, though I was unable to see which zone the red light was for. I turned off the boiler at the emergency switch as it sounded really bad.I called my landlord and they said they couldn't get anyone for a day or so, I kept the switch off for about 4 hours then turned it back on, monitored it and then took a shower. Everything seemed fine, the green light at the bottom of the zone valve control came on, no red lights and everything is running great now.I asked the landlord to schedule a cleaning for the boiler and now we have cancelled the service call as it is acting fine now.Any idea what the problem could be?
It sounds like the circulator pump may have been making noise. If the red light was on that usually means you have power to the multi-zone relay control box and then for each green light you see lit up, that would be a zone that is calling for heat. Depending on what type of pump you have, it could need oiling too. If it is the large red Bell Gossett series 100 or HV, they need annual oiling. The smaller cartridge style pumps have sealed bearings and you cannot oil them. Also if it is the larger BG pumps you could have an issue with a pump coupler starting to go bad. Nonetheless, I highly recommend ANNUAL cleaning of boilers, furnaces and air conditioners. The manufacturer's specify that the equipment needs to be professionally serviced annually to stay within warranty and once their out of warranty they are more prone to have problems, so once a season is a must. Cheaper to find and fix a potential problem in the preseason than it is to have a system go down in the middle of sub-zero weather. Then you have to worry about pipes bursting. Check out my source page on Home Systems and it will show you a list of routine ANNUAL maintenance and cleaning checkpoints.
loud squeeling noise? sounds like the circulating pump.. bably just had some trash in the line..then it got freed up. it will be impossible for some one to figure it out unless it happens again when the tech is there....
