Clean and check electric furnace. Tested heating elements. Tested sequencers. Checked voltage & amp draw of motors. Checked temperature rise. 70. System amp draw: 58.8. Voltage: 239. I replaced air filter. I set damper in main trunk line to “winter“ position. I found evaporator coil accumulating dirt. Recommend cleaning. Checked temperature rise. 57. Suggestions: evaporator coil cleaning: $135. Customer declined at this time.