Great job as always!
Performed diagnostic on York package unit. System is not cooling. Cycled thermostat for cooling. Unit kicked on for a minute and then shut off, tripped on low pressure switch. Gauged up to unit and found it low on refrigerant. With approval charged system back up to proper charge of refrigerant and added leak sealant and dye. Also found that thermostat was cutting command to unit too soon before reaching temperature. Replaced thermostat. System is now producing proper temperature split and cooling correctly. Cycled system, system is operational upon departure. Office to bill.
Found unit not cooling again. Checked refrigerant pressures and found unit low on refrigerant. Charged system back up with refrigerant, added leak sealant and dye. System is now producing proper 20 degree temperature split and cooling correctly. If unit becomes un operational again we will return to perform leak search. Office to bill.
Upon arrival performed diagnostic. Found system to be low on refrigerant. Added 1.2 lbs of refrigerant. System is now cooling, 62 degrees out of vents and 80 from return. Coil was iced up. Let it de ice. Advised property manager, please bill. Do not charge personal credit card.
Installed new board and Main limit switch. Cycled system, system is now heating upon departure.
Performed heating diagnostic on 2 year old Lennox package unit. System is not heating. Cycled system for heat, circuit board showing open main limit. Filter was extremely dirty. Removed filter and reset, still showing open limit. Tried bypassing limit switch and board is still showing that limit is open. Need to order board and limit switch and return to replace. System not operational upon departure. Will order parts and return to repair. $480 due on completion
Doing a single system heater maintenance out here in Fountain Valley