Performed yearly maintenance and safety checks on 2004-2008 Goodman furnace. Cleaned flame sensor. 47 ohm igntion. Found inducer reading high amps. 2.52a. Part has high squeal while running. 45.3 degree deltat. Quoted hm8 for repair. Customer will wait for now. Replaced 16251 filter. Also found no dirt leg on water heater or furnace. Advised with 93 water heater, if changes were made at this point that he likely would need to replace heater. Customer is aware and counting days to replacement. Advised we replace tanked/tankless water heaters. Customer will keep in mind. 56 degree deltat. 35 ppm co in flu. 0 ppm co in supply. Also performed yearly maintenance on 01 airtemp furnace. Replaced 20251 filter. Cleaned flame sensor. 52 ohm ignition. 7.6%o2. 33 ppm co in flu. 0 ppm co in supply 55 degree deltat.