Question about Heating & Cooling
Martin invented gas stove mdl. AU40D/U40G/U40F pilot lights but will not stay lit already replaced thermocouple how do I check the low oxygen cutoff
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Pilot light lit but no heat
the pilot's millivolt generator may be at fault. if you have a meter that is capable of measuring a very small DC voltage, connect it up to the very end of the thermocouple and the copper cappillary. the thermocouple has a welded bead at the very end inside that generates a small DC voltage. Same principle of a J-K thermocouple. Iron constintan - two dissimiller metals where joined together produce a voltage when heated. the thermocouple actuates a millivolt electromagnet inside the valve to keep the valve pellet open. no voltage there it won't actuate the electromagnet.
Posted on Oct 15, 2007
Is this a standing pilot furnace, or electronic igniton?
If standing pilot, does the heater use a fan to blow air through the heat exchanger?
If the answer to those questions is yes, then check that the pilot orifice is not partially plugged and that there is a strong pilot blowing against the thermocouple. If there is, replace the thermocouple. If not, check the orifice again, and check that the inlet screen to the gas valve is not filled with gas line trash.
If the the pilot flame is good and it continues to go out, the thermocouple magnet in the gas valve may be weak. Replace the gas valve as to get just the magnet and coil is not easy.
Reply back any questions you may have.
Posted on Jan 28, 2009
how by extending the duct work will it make the gas valve work ?
if the pilotkeeps going out clean pilot jet , or if the power unit has gone in the gas valve then you would have to change the valve , don't get the flue bit ?
Posted on Feb 24, 2009
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