02-26-2019, 08:26 AM
I put in a new Tempstar high efficiency two stage natgas furnace about 3 years ago. This entire heating season and part of the last heating season I have noticed an issue when there is a call for heating the fan will start in high speed, the furnace will fire run for a few seconds, shut off, then on the second start it will run fine.
I can't say for sure but I think it does this every single time it fires. I replaced the flame sensor with no change in behavior.
The only other issue I have had since i put this furnace in is the intake acted like it was clogged so I changed out the 2.5" pipe and went to a 3" intake and also did a more direct path to the outside. The odd thing was when I took out the 2.5" line I didn't see a clog but it did fix the problem. I also have changed the filter pretty regularly. Also, it looks like the ignitor is working.
There is no trouble code that I can see but I have never looked at it while the issue is happening.
Any ideas...? it looks like the igniter is working fine as well.
I can't say for sure but I think it does this every single time it fires. I replaced the flame sensor with no change in behavior.
The only other issue I have had since i put this furnace in is the intake acted like it was clogged so I changed out the 2.5" pipe and went to a 3" intake and also did a more direct path to the outside. The odd thing was when I took out the 2.5" line I didn't see a clog but it did fix the problem. I also have changed the filter pretty regularly. Also, it looks like the ignitor is working.
There is no trouble code that I can see but I have never looked at it while the issue is happening.
Any ideas...? it looks like the igniter is working fine as well.