I showed their maintenance guy how to delime the Steamer unit. But the ready light never came on and the unit was over heating. I flushed the unit multiple times and was able to get it to work. I told them to have the maintenance guy delime it multiple days in a row to get the boiler cleaned out and temp probe descaled. The ready light comes on sometimes very dim. The door switch was missing a screw and was ready to fall out but I put it back together. The unit is able to be used at this time. We will order the part and return to install. 7-23-19 Ran unit through deliming cycle. Removed failed pilot/ready light and replaced. Found ground wire out of grounding lug. Repaired ground and checked operation. Unit operating normally at this time. Left 2 gallons of descaler and MSDS with customer.