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Posted by HeatPro on April 08, 2007 at 12:00:42:
In Reply to: Heatmaker Mark II posted by Jef on April 08, 2007 at 11:41:59:
Any ideas as to what the problem may be?
You can take the expensive parts replacement route using every part as a test instrument until you find a problem. However, this doesn't mean that a new part is adjusted for your heater situation, as parts are used in several different brands of heaters requiring adjustment for the particular model and situation. Parts that are found good can be kept for some decades as spares whenever a repairman takes the same parts replacement route.
To the novice in the heating field, the most common idea is that there is only one problem at any time and it is probably just finding the one part that can fix all of the problems.
NOT the way it is. All electrical connections must be cleaned and tightened first. Then the gas manifold pressures and exhaust pressures must be verified to be at factory design specifications. A temperature sensor at the top of the water heating tank might need to be moved.
Only after careful verification and adjustment is performed with test instruments can a failed part be found (excluding something that visibly fell off.)
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