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Old 01-29-2009, 10:15 PM   #1
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Furnace Service


Most HVAC companies offer Fall/Winter and Spring checkup packages.

Does anyone know what a tech normally checks during the Fall/Winter checkup with regard to a gas furnace?

Is anything usually done with the gas valve regulator?

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Old 01-29-2009, 11:17 PM   #2
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I can't imagine the gas valve regulator to be a serviceable item. What they can do is a pressure test to make sure that the amount of gas coming in and leaving to go into the burner is correct and perhaps a voltage test across its leads to ensure that approx. 24 VAC is coming into the regulator to cause the solenoids inside to open and to allow the gas to flow through to the burners.

As I had found out just two days ago I had a faulty one (furnace worked sporadically and had to occasionally be reset from its lock out position - even after cleaning the flame sensor) and in the end that it had to be replaced. Furnace is now working like it is brand spanking new.

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Old 01-30-2009, 07:56 AM   #3
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How often do people check on their furnaces or other gas appliances via a sniff test to make sure there's no leaking gas? I would assume for a furnace that there could be residual uncombusted gas.

Does anyone know if gas companies mix in a chemical like they do with propane which allows humans to detect gas?
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Old 01-30-2009, 10:01 AM   #4
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your stove gas odor is the universal injected smell in natural gas
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Old 01-30-2009, 01:49 PM   #5
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Gas press with in the gas valve can be adjusted. The usual setting is 3.2 to 3.5" WC.

You need a analog manometer or a digital one to read it.
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Old 01-30-2009, 01:56 PM   #6
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One thing HM88, you better have insurance if your are thinking of branching out into Clean and checks of furnaces.

Anal inspections for customers can be profitable but you need some specialized equip.

When I do an anal inspection I use a telescopic camera I shove it up inside the HOs equipment.

The cameras cost about $250. Insurance will vary. If you have insurance now ask what kind of coverage you have. If it doesn't cover Heating service get a rider or change your coverage.
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Old 01-30-2009, 02:41 PM   #7
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All Natural gas delivered by pipe line, has the oderant added.
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Old 01-30-2009, 02:48 PM   #8
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Quote:
Originally Posted by hvaclover View Post
One thing HM88, you better have insurance if your are thinking of branching out into Clean and checks of furnaces.

Anal inspections for customers can be profitable but you need some specialized equip.

When I do an anal inspection I use a telescopic camera I shove it up inside the HOs equipment.

The cameras cost about $250. Insurance will vary. If you have insurance now ask what kind of coverage you have. If it doesn't cover Heating service get a rider or change your coverage.
Oh no.

I have absolutely no aspirations to do anything with regard to an HVAC business.

I was just asking to become more familiar with the equipment.
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Old 01-30-2009, 05:02 PM   #9
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Quote:
Originally Posted by hvaclover View Post
One thing HM88, you better have insurance if your are thinking of branching out into Clean and checks of furnaces.

Anal inspections for customers can be profitable but you need some specialized equip.

When I do an anal inspection I use a telescopic camera I shove it up inside the HOs equipment.

The cameras cost about $250. Insurance will vary. If you have insurance now ask what kind of coverage you have. If it doesn't cover Heating service get a rider or change your coverage.
Boy this sounds dirty. Or is it just me.
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Old 01-30-2009, 06:03 PM   #10
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Old 01-30-2009, 06:32 PM   #11
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The chemical they mix in is called Mercaptan. Is Sulphur based and smells like rotten eggs or the week old burger wrapper in my service van. LOL

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