Came out to call for a system not heating properly. We were out recently for the same issue. Previous tech stated that the defrost control board wasn’t sending unit into defrost. Ran system in cooling mode to check operation. Unit wasn’t heating properly due to system being low on refrigerant. Discussed with customer about repair of system. Customer has had multiple issues with the system. He stated that he cannot afford to replace it, but does need it fixed. I recommended doing a major leak search on the system to try and locate a leak on the unit before charging it again. Customer proceeded to say that he can’t afford to fix the current issue and will need to wait till next month. Didn’t charge a service fee seeing we were out here last week for the same issue.