if a gas - fired furnace is constantly trippi...
if a gas - fired furnace is constantly tripping on a high limit safety control, which of the following is likely not a cause for this condition? a. improperly balanced air distribution system b. duct lining has come loose from the main trunk line c. dirty air filter d. defective furnace blower motor
Answer
# Brief Explanations:
An improperly - balanced air distribution system, a dirty air filter, and a defective furnace blower motor can all cause over - heating issues that might trip the high - limit safety control. However, a duct lining coming loose from the main trunk line mainly affects air leakage and noise rather than directly causing over - heating that trips the high - limit safety control.
# Answer:
B. Duct lining has come loose from the main trunk line