Lennox G27M fan will not stay on.
A couple of weeks ago, I noticed a pulsating sound coming from my vents. What I found is that with the AC on or FAN on, the fan is not staying on consistently.
The fan will shut off, I hear clicking in what I am guessing to be a relay, and the diag lights switch from a simultaneous blink to a solid green. After a second or two, the fan tries to restart, the diag lights switch back to a simultaneous blink. Sometimes it stays on for a few minutes, other times it will try 4 or 5 times to restart. Sometimes it will restart and keep operating as normal.
If I turn off the electricity to the furnace and then turn it on again, it will run normally for about 5 minutes. It does seem that the longer I leave the unit off, the longer it will run.
I replaced the air filter about a week ago in hopes of helping the situation, but it has not.
So I am looking for thoughts on what I should check next and how to check it. Any help would be appreciated!