Well finally found time to replace t-stats and we think we found the heating problem! Apparently when I purchased a 6 month old take out radiator that was in a wrecked coach identical to mine, the seller had for whatever reason stuffed a red shop rag in the inlet, then wrapped it in Saran Wrap! My guess is during shipment, the rag got inside the radiator out of view and for almost two years, I've been fighting a running hot problem! Tried everything but t-stats until now and this is what we found! Also found rag wrapped around shaft of water pump which is also being replaced! Glad I had a new spare!
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