Forced Air Heating Blower short cycles
#1
Member
Thread Starter
Join Date: Feb 2016
Location: USA
Posts: 10
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Forced Air Heating Blower short cycles
I have an oil fired furnace hydronic forced air heating system. The second floor zone blower unit constantly short-cycles. It will run for about 30 seconds then shut off for a minute or two and then run for about 30 seconds again and so on. This keeps happening until the t'stat is satisfied. What would be causing this?
#4
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 12,682
Received 41 Upvotes
on
39 Posts
Often the fans on hydronic fan coils are controlled by water temperature. If the sensor is not tight against the pipe, you will get erratic fan operation. Another possibility is the sensor itself could be the source of the trouble. Still another is the water actually cooling faster than it used to maybe due to insulation on the pipes being lost. A problem like this can take a lot of investigation.