| [GMCnet] Suburban furnace problems [message #352654] |
Mon, 09 March 2020 04:04  |
Gerard Hickey
Messages: 53
Registered: June 2019
Karma:
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I have been starting to work on the Suburban furnace that is in my
coach. It is a SF-30 model and looks like it was fairly recent install
by the PO.
The problem I have had is that it will tend to heat for about a minute
and then shutdown. I am starting to believe that a good portion of my
problem is the thermostat (original). I have cleaned the thermostat a
bit and I am pretty much planning on replacing it with a round dial one
from a house.
But in playing and working on it the furnace was firing for about 5 mins
today. Still did not bring the heat up in the coach significantly even
though the thermostat was turned up all the way. After it shutdown the
blower continued to run. It ran for upwards of 10 mins before I killed
the furnace from the thermostat. Now I can see the blower running for a
minute or so to cool the burning chamber a bit and to get the last of
the excess heat, but it was blowing cold air for quite a while.
Does anyone have any thoughts on what might be going on? Is this still
an ignition problem where the furnace shuts down but still "thinks" it
is burning? I would say that it is just the time delay relay that needs
to be replaced if the furnace kept burning until the temperature got to
about where the furnace got to a point where it should shutdown.
Thanks.
--
Gerard Hickey / WTØF IRLP:3067/Echolink:529661
hickey@kinetic-compute.com DMR: 3102272
425-395-4554
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