International Association of Certified Home Inspectors
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| HVAC Topics include heating, venting, and air conditioning. |
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#1
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A family member's home...
When the thermostat calls for heat the draft inducer fan comes on but that is it...it runs continuously and nothing else happens...the igniter doesn't glow, the burners don't ignite, etc. Chimney's not blocked and the vacuum hose isn't cracked. Any ideas before calling a service tech? Thanks. ____________________________________________ "An Education, not just an Inspection" Larry Kage Lake Ann (Traverse City), Michigan 49650 231 929 3525 Professional Inspector and Infrared Thermographer serving the Traverse City, Michigan area and beyond. ITC/FLIR CERTIFIED BUILDING SCIENCES THERMOGRAPHER ITC/FLIR CERTIFIED LEVEL 1 THERMOGRAPHER
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#2
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It's not making the diaphram switch that proves that the draft fan is operating - could be a bad diaphram, or if it's a condensing furnace, the drain line could be clogged, and the trapped water could be slowing the fan enough to keep it from making the switch.
“Of liberty I would say that, in the whole plenitude of its extent, it is unobstructed action according to our will. But rightful liberty is unobstructed action according to our will within limits drawn around us by the equal rights of others. I do not add 'within the limits of the law,' because law is often but the tyrant's will, and always so when it violates the right of an individual.” - Thomas Jefferson |
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#3
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Quote:
It is not a condensing furnace...it's 80% plus Rheem about 20 years old. I'm off and will check back later. ____________________________________________ "An Education, not just an Inspection" Larry Kage Lake Ann (Traverse City), Michigan 49650 231 929 3525 Professional Inspector and Infrared Thermographer serving the Traverse City, Michigan area and beyond. ITC/FLIR CERTIFIED BUILDING SCIENCES THERMOGRAPHER ITC/FLIR CERTIFIED LEVEL 1 THERMOGRAPHER
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#4
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Please Note:
Gary Reecher is a non-member guest and is in no way affiliated with InterNACHI or its members.
Could be the draft pressure switch, the pickup port for the draft switch restricted or plugged, inducer wheel for draft switch dirty or rusted away, inducer running slower either through bad bearings or a lower voltage being applied or a split in the heat exchanger.
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#5
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Quote:
____________________________________________ "An Education, not just an Inspection" Larry Kage Lake Ann (Traverse City), Michigan 49650 231 929 3525 Professional Inspector and Infrared Thermographer serving the Traverse City, Michigan area and beyond. ITC/FLIR CERTIFIED BUILDING SCIENCES THERMOGRAPHER ITC/FLIR CERTIFIED LEVEL 1 THERMOGRAPHER
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#6
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And, when all is said and done and a qualified individual services and repairs as necessary - remind them that gas fueled combustion equipment should be serviced at a period not exceeding 2 years. Maybe something just gave up the ghost but it does not sound like a routine maintenance program has been in place.
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#7
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Quote:
____________________________________________ "An Education, not just an Inspection" Larry Kage Lake Ann (Traverse City), Michigan 49650 231 929 3525 Professional Inspector and Infrared Thermographer serving the Traverse City, Michigan area and beyond. ITC/FLIR CERTIFIED BUILDING SCIENCES THERMOGRAPHER ITC/FLIR CERTIFIED LEVEL 1 THERMOGRAPHER
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#8
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Does the gas control valve make a clicking noisy?
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