Chris Rosales came out due to no heat, upon arrival found unit on, recommended tune up to find cause of problem, customer agreed to membership tune up. During tune up discovered pressure switch would not stayed closed error 46. Customers furnace installed 2017, unit is under warranty, will pick up parts and install tomorrow. Customers flue vent has no slope and needs to be redone tomorrow. Dispatch to schedule job for tomorrow morning. Chris Rosales came back the next morning and redid flue vent for efficiency and to have slope so combustion motor and pressure switch does not fail again. Warranty on flue and pressure switch 2 years. Unit is heating at this time. Customer paid $139.00 on check.