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)	3.6 to 17.6 Ω
  	-10°C (14°F)	3.4 to 16.5 Ω
  	0°C (32°F)	3.1 to 15.4 Ω
  	10°C (50°F)	2.8 to 14.3 Ω
  	20°C (68°F)	2.7 to 13.2 Ω

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