Performed HomeCarr routine maintenance inspection on 3 y/o Rheem system that operates for whole house. Furnace located in crawlspace. Checked amp draws. Cleaned flame sensor. Cleared pressure switch tubing. Replaced customer supplied Model 213 media filter. Safeties are good. Condensate pump operational. Pressure levels were normal. Performed condenser coil cleaning. Condenser electrical components are good. Recommend iWave-R Air Ionizer for air purification. System is currently working.