had a call tonight boiler making loud gurgle noises crackling.
figured ok air in the system will go out hook hose up hit fast fill open valve to hose and run air out of system, any way it has two zones.
lot of valves good to blow everything out seperat.
ok I blew out boiler then zone one then zone two
now start it up after spending good hour getting air out of system.
fires up same thing after not even like 2 minutes maybe 3 it starts gurgeling and crackling in the boiler loud check aquastat set at 180f go around touch all the baseboard its hot go back to boiler still making all these wierd sounds now once the aquastat reaches set temp flame goes out sounds stop, only thing going is pump real low.
but everytime it fires up makes loud sounds.
I blew zones out again and boiler same thing, could not find a cure for the problem what em I missing.
oh I also watched the city water meter between filling it and running it meter did not move to indicate a leak.
house is on slab and lines to baseboard run under concrete
boiler is a Utica model 75/G AND IT IS 75,000 BTU INPUT & 63,000 BTU OUTPUT ITS A 1983 but real clean looking unit.
anyone ever run accross something like this