Performed annual heat maintenance loomis. Rheem split horizontal under house. Found thermostat sticking, buttons not working correctly. Also found inducer capacitor 4@3.5. As well as blower capacitor 15@12.8. These are outside manufactures recommend range. Also this system has 2 filters in it the 4†at the filter and a electromaze In the register. Only needs one. Inside of this furnace is rusted as well as the other. It looks like it had been leaking in the past. Cleaned burners and flame sensor. Electrical connections ok at this time. Filter is a 20-25-4