Wait till you have to put a boiler tank in the unit and if it is used alot with out filtration on water(hard water) you will need one it is about 100.00 cheaper than the whole steamer new. I have quoted 2 to the same custormer both of his took a dump a week apart. Some times the problem you describe can be from a stopped up tank. Have you opened up boiler and looked inside? The unit s have an annoid in the that go away after a year then the scale attacks tank and burner sleeve.