Came out today for a no ac call on a Lennox system. Upon inspection I found that the system had a temperature split of 8. I connected my gauges and noticed that the system was low on refrigerant. I charged the system with 4lbs of 410-a refrigerant and added one ez seal stick. The temperature split is now at 20. Per PA there is no charge for the refrigerant and ez seal due to the constant issues the homeowner has had with the system. Homeowner also has a repair agreement.