Heater not heating. Heating repair and maintenance tune up. Diagnose and perform annual heater maintenance service plan on Amana heating system. Repair wiring and check furnace on 6 year old HVAC system. Heater maintenance complete which will help lower heating cost for this residential customer. R22 refrigerant was phased out in January 2020. Recommend replacement with new Comfortmaker air conditioning system. Heating system is now ready for Texas weather.