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WorksheetsTroubleshooting
Total questions: 10
Worksheet time: 5mins
An open switch will read 0 volts across it?
True
False
If you switch the fan to on at the thermostat and it starts you know?
Line voltage is present.
Low voltage is present.
The fan motor is operational.
All the above.
If you read 240 volts on the line side of the contactor, 240 volts on the load side of the contactor and the compressor is not running?
The contactor is faulty.
The thermostat is faulty.
The compressor or wiring is faulty.
The contactor coil is open.
If the indoor fan is not operating and applying an insulated jumper from R to G causes the fan to start.
The fan relay is faulty.
The thermostat is faulty.
The door switch is faulty.
The contactor is faulty.
To make the heat start with the thermostat removed f4om the base place the insulated jumper?
From R to C.
From R to Y
From R to W
FRom R to G
Th make the fan run with the thermostat removed from the base apply a jumper?
From R to Y.
From R to W.
From R to G.
From R to C.
To make the condensing unit start apply a jumper from ___ to ___ at the thermostat base.
R to Y
R to G
R to W
R to C
If you remove the thermostat from the base and measure 24 volts from R to C & R to W but 0 volts from R to G?
The cooling contactor is open.
The gas valve is open.
The fan relay is open.
The fan relay is shorted.
If you measure 24 volts at the contactor coil and 240 volts across the contacts?
The compressor is faulty.
The thermostat is faulty.
The contactor is faulty.
Nothing is wrong.
The contacts on a potential relay should read 0 ohms when de energized.
True
False
