Came out today for a Lennox heat pump not cooling. Model #cbx25uh02423010, serial #1716L20042. Upon inspection I found that the condenser was locked out on high pressure. The condenser coil’s are clean and in good condition but the air filter was severely clogged. The air filter was dated 6/16/21. I advised the homeowner that the filter should be replaced every 2-3 months. I replaced the air filter and reset the pressure switch. The system started right up. The temperature split is at a 19. The refrigerant pressures are 149/275. These are normal readings for the temperature outside today. The system is operating properly at this time
Came out today for a no AC call on a Lennox system. Upon inspection I found that the low pressure switch was tripped. I connected my gauges and reset the low pressure switch. I noticed that the system was slightly low on refrigerant. I added 2lbs on 410-A and the pressures are now within normal range. The temperature split is at a 20 and the system is operating properly at this time.
Performed preventative maintenance for air conditioning/heat pump system. Replaced the standard air filter. Inspected all the electrical components. Made sure the gravity drain to sump pump was clear. Tested the temperature split between the supply and return. System is operating at a 19° differential. Tested the amp draw from the compressor, blower and fan motor. All were operating within the manufacturer spec. Air filter should be replaced once every 90 days. System is operating properly at this time.