Zone valve control for gas boiler?

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 B&G 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.