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Posted by Simie on November 01, 2005 at 12:18:55:
My Dunkirk q90 cycles every 5 minutes. The installer(Guess and Wonder) did a hack job and now won't fix it. I've had other people look at it too. Nobody has an answer. Prepurge, ignition, heats up to 180 in about 4 minutes shuts off, post purge, cool down, then prepurge about 2 minutes later and on we go again. The aquastat is set okay, secondary aquastat is set okay. One zone for a 33 by 65 foot room with 17 foot ceilings. Regular slant fin radiators. Any ideas?