Eastpointe homes along Gratiot, Kelly Road and 9 Mile look a lot like the ones across Eight Mile in South Warren, and the boilers act alike too. The call usually comes in as no heat. Gary starts by raising the thermostat a few degrees above room temperature, so we know there is a real call for heat, then listens at the boiler.
If nothing happens, we work down the chain. Is there 24 volts at the gas valve? Is the low water cutoff tripped? Is the pressuretrol open because it's set too low or because pressure never dropped? On standing pilot units we check the thermocouple. On newer ones, the igniter and flame sensor. Root cause first, parts second.
Once it fires, we watch the sight glass. In a lot of Eastpointe basements the water line is brown and jumping, which tells us the boiler is dirty and probably surging. Dirty water carries over into the mains, the vents spit, and the boiler short cycles on low water. That needs a skim and a flush, not a new boiler.
Before we pack up, we check the relief valve for weeping and look for any sign it has lifted. On a residential steam boiler that valve is rated 15 psi. If it has been popping, something upstream is wrong, usually a clogged pigtail or a pressuretrol set too high. We fix that cause and never plug the valve.