Measure the resistance according to the value(s) in the table below.

• Standard Resistance:

• Tester Connection	Condition	Specified Condition
  1 (APH+) - 3 (APHG)	-20°C (-4°F)	4.4 to 20.0 Ω
  	-10°C (14°F)	3.9 to 18.0 Ω
  	0°C (32°F)	3.5 to 16.0 Ω
  	10°C (50°F)	3.2 to 15.0 Ω
  	20°C (68°F)	3.0 to 14.0 Ω

If the result is not as specified, replace the air pump assembly.