During diagnosis of an ATC system a trouble code is obtained that references the blend door feedback sensor. Tech A sasy the sensor should be replaced. Tech B says the sensor circuit should be tested. Who is right?
Explore more HVAC questions
for other HVAC topics now!
Nozzles can be cleaned to remove any carbonization by using a very fine wire brush.
The air that is discharged from the Atlas-Copco compressors potentially has moisture content in it. How is this moisture removed?
When a start capacitor is added to the start winding of a single-phase induction motor, the starting torque of the motor is increased _____________by %.
The purpose of the Low Level Outlet Works is to __________________.
Coefficient of heat transmission
how does a bimetal function
A building under design in a temperate climate will have some areas that require cooling and others that require simultaneous heating. To minimize energy use, the best devices to employ would be
The compressor cycles quickly and air coming from the vents is only slightly cool. Tech A says the problem could be a low refrigerant charge. Tech B says it could be a defective thermostatic switch. Who is right?
If two capacitors are connected in series and one fails due to a short, what may happen to the other one?
Why are split-phase motor compressors usually used on domestic refrigerators and freezers?
What is system lag
What creates turbulence in the air-oil mixture to increase efficiency
How can a technician tell the difference between an up-flow furnace and a down-flow furnace?
____ and ____ pipes should be pitched toward the tank opening to prevent the formation of oil traps.
If a capillary tube were to break at some point between its sensing bulb and the TXV what would happen to the valve?
What type of ac motor uses brushes?
Tech A says that mineral deposits can restrict air flow through the radiator. Tech B says that internal restrictions in the radiator can be detected from the outside. Who is right?
All of the following could cause poor heating performance EXCEPT:
what are three elements used with a line voltage thermostat