34-year-old train r22 heat pump is very low on refrigerant charge. The system is not cycling on any safety switches and is continuing to run at 34 to 36 PSI suction with intermittent freezing occurring Estimate prepared for the homeowner for a worst case scenario was approximately $1,425 for 15 lb of refrigerant with labor and leak stop. Homeowner understands he will only be billed for the used amount but has declined repairs at this time and would like a replacement estimate and financing information If a refrigerant charge is desired within the next 30 days no additional trip charges will be billed. The estimate will be for labor including leak stop and up to 15 lb of refrigerant. Homeowner understands that the refrigerant will be build by the quarter pound and the bill will be adjusted at the end. The mandatory authorized estimate is a worst case scenario if all 15 lb of refrigerant is required