Question

A tech servicing an oil furnace that uses a stack mount relay notices that the burner motor is not operating. What two terminals must he place his voltmeter across to test for output voltage from the control to the burner motor?

a. terminals 2 and 3
b. terminal 4
c. terminals 102 and 3
d. terminals 2 and 7

Answer 1

To test for output voltage from the control to the burner motor in an oil furnace with a stack mount relay, the tech should place his voltmeter across terminals 2 and 3.

Step-by-step explanation:

In order to test for output voltage from the control to the burner motor in an oil furnace that uses a stack mount relay, the tech must place his voltmeter across terminals 2 and 3. These two terminals will allow him to measure the voltage being sent to the burner motor.