Customer had a puddle of red fluid in front of boiler, couldn’t see where leak was coming from, turned heating side of boiler on and noticed boiler pressure jumping to 43 PSI and relief valve on top of boiler began dripping, took pressure reading of expansion tank and tank pressure was 32 PSI, expansion tank had failed, replaced tank and purged system everything came back hot, tested faucets to make sure pressure was good and hot water coming from faucets and shower in master bedroom, shower in hallway has no flow of hot water customer would like a plumber to come out and take a look to resolve issue,. Everything else operational and working.