Control Module HVAC: Testing and Inspection

Fig. 90 Testing temperature control amplifier:

1. Remove control amplifier from control assembly.
2. Connect an ammeter, battery, and variable resistor to amplifier as shown in Fig. 90.
3. With resistor set at 250 ohms, meter should read 0.3 amp; with resistor set at 270 ohms, meter should red 0.1 amp.