When troubleshooting a hydronic heating system, the technician notices that the circulator pump is running and the burner is firing, but no hot water is flowing through the system. What is the most likely problem?
A. defective circulator pump
B. defective room thermostat
C. air in the system
D. high limit open
Answer: C
You might also like to view...
Explain how to use the Right Hand Rule to determine robot motion.
What will be an ideal response?
Why is it necessary to reproduce plants asexually?
What will be an ideal response?
What time of the year are hardwood cuttings taken?
What will be an ideal response?
Can changes in atmospheric pressure affect refrigeration gauge pressure readings?
A) Atmospheric pressure changes can affect high-pressure gauge readings, but not compound gauge readings. B) Atmospheric pressure changes can affect compound gauge readings, but not high-pressure gauge readings. C) Changes in atmospheric pressure can affect the final reading by changing the calibration point of the gauges. D) Since refrigeration systems are closed to the atmosphere, atmospheric pressure has no effect on refrigeration gauge pressure readings.