Main level unit. Changed filter. Clean drain. Checked all electronic components. Checked amps on draft induced motor and blower motor. both test fine. Clean flame sensor. Check all safety switches. All the switches. test, fine. Furnace working as it should. upstairs unit. Change filter. Clean drain. Check all electronic components. Clean flame sensor. Checked all safety switches. All safety switch test fine. Gas furnace working as it should. Master bedroom mini split. Changed filter. Clean drain. Duct. Mini split. also, on the mini split return grill did not get put on. I need a 14 x 20 return grill. See picture on grill.