Just bought a fairly new house with an oil-fired water heater (standalone,
not something that hangs off the heating system), and it's doing something
that seems strange.
About a minute after it starts firing, and continuing until maybe a minute
after it shuts off, there's a kind of gurgling sound coming from the tank
that really sounds like the water is boiling. This is accompanied by
fluctuations in the pressure of the water which would also make sense if
My question is, is this normal for an oil-fired water heater? My worry is
that somebody stuck a too-large nozzle in the burner in an attempt to get
more hot water and now it's generating too much heat. The thermostat is set
at the "normal" setting - 120 degrees.