My furnace will run great for most of its cycle, but when it has almost reached the thermostat setting, I will hear it shut off, run the blower, then re-light. It will sometimes finally reach temperature, but other times it will continue to cycle until I shut it off.
I had the installer look at it in Nov. 2016 and they told me "cannot find anything wrong." Then in Feb. 2017 they told me "unit has issues with gas valve" and replaced the modulating gas valve. I continued to have issues, so in April 2017, they replaced the flame sensor.
The next year, I continued to have issues. At one point, I finally heard what sounded like water in the inducer motor. I pulled the drain lines and cleaned the condensate trap. That fixed it for a while, but then the issue started happening again.
The problem started again this past December. I had a different HVAC tech come look at it, and he replaced the entire condensate trap at the beginning of January. He also told me the furnace was tilted away from the trap and that made it hard to drain water and also that the inducer was going bad (it's extremely loud) due to the water that had backed up.
The furnace ran great for about a month but is now having the same issue. The error codes are always either "low flame sense" or "lost flame sense."
I have spent about $900 so far, and while I don't mind paying to have something repaired, I feel like I've been chasing the same problem for two years now. Any help is greatly appreciated!
Model: Rheem RGGD-09EZCMS