Forum Discussion
Old-Biscuit
Aug 07, 2015Explorer III
OP......
It sure would be nice if you would take a deep breathe, relax and THEN post what the problem is.
You talk about furnace,then reference water heater.........then back to furnace
Furnace
Runs on 12V DC power....fan motor and controls
Gas valve opens via DC power at same time ignitor sparks.
Turns ON/OFF via thermostat control/temp set point.
Fan has to run first to purge & establish air flow BEFORE ignition/gas valve
Can take several attempts to light after prolonged periods of non-use
Main flame generates a signal that goes back to circuit board via spark electrode to prove flame lit. No signal...gas valve closes
Water heater....
Uses 12V DC power to operate propane (and electric heat element if it is an Atwood Brand)
Propane ON.....DC power goes thru t-stats to circuit board then to gas valve and ignitor.
Main flame lights off then generates signal that it is lit. IF spark electrode is dirty or out of position (engulfed in flame)...signal will not get back to circuit board so gas valve closes.
Also can take several attempts to light off after prolonged periods of non-use
Spider webs/mud dabbers/bugs etc. can disrupt propane flow....doesn't take much.
A good cleaning at beginning of season will usually prevent most issues
It sure would be nice if you would take a deep breathe, relax and THEN post what the problem is.
You talk about furnace,then reference water heater.........then back to furnace
Furnace
Runs on 12V DC power....fan motor and controls
Gas valve opens via DC power at same time ignitor sparks.
Turns ON/OFF via thermostat control/temp set point.
Fan has to run first to purge & establish air flow BEFORE ignition/gas valve
Can take several attempts to light after prolonged periods of non-use
Main flame generates a signal that goes back to circuit board via spark electrode to prove flame lit. No signal...gas valve closes
Water heater....
Uses 12V DC power to operate propane (and electric heat element if it is an Atwood Brand)
Propane ON.....DC power goes thru t-stats to circuit board then to gas valve and ignitor.
Main flame lights off then generates signal that it is lit. IF spark electrode is dirty or out of position (engulfed in flame)...signal will not get back to circuit board so gas valve closes.
Also can take several attempts to light off after prolonged periods of non-use
Spider webs/mud dabbers/bugs etc. can disrupt propane flow....doesn't take much.
A good cleaning at beginning of season will usually prevent most issues
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