peeved senior in Pickering

For the second straight year in a row they have come to maintain our on-demand hot water heater and have not correctly completed the job. They don't return calls and still are supposed to come and complete the job but haven't weeks after they said they were returning. We only call them because the unit is under warrantee. Otherwise I would never use them for any reason. After last year's 'repair' the unit leaked all the time. Now the pipe is sealed but there is no way to appropriately use the release valve if needed! We need this fixed!