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LP Wall Furnace --- Replaced the gas valve
I have an old "monkey wards" propane furnace in a cabin, replaced the gas valve(Essex TF5)... The old valve had a "low" and an "on" setting... Owners manual stated to run the valve in the "low" mode unless it was really cold out.
Of course the new valve is just "pilot" and "on"(white rogers 36c03-333) ... My question is the fan seems to do some strange things now...starts out at low speed, then shifts to high speed, then shifts back to low speed.... Is this normal? ( haven't ever ran this furnace before, so don't really know how it used to operate, but I have a Williams wall furnace in another cabin that acts differently)
I'm wondering if this new valve maybe a Hotter valve than the old one....? Also, I think fan operation is completely separate from the "valve".... The fan is controlled by the limit switches and the fan switches isn't it? These are temperature sensitive "snap style" limit switched ... I think.
Is there a way to adjust this thing so just the low speed fan runs or if it is really cold the just the hi speed fan runs?