seasonedtech

Hello... hopefully someone is still reading this forum... I *too* have the 172/186 error codes on my APURE1400 (installed Aug 2007). Cleaned cell & filters then ran the front board test... 2 of the 3 test produced different readings: 2.7 (should read 2.8), 74 (should read 75), and 91 (should read 91). So based on the guide, if the readings are different then it's the board... It's not clear in the troubleshooting guide if different means all three readings are different or just some. Is there any other tests I can run to confirm if the board is truly the issue? Thanks in advance!