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Brian HVAC Guy
Brian HVAC Guy, HVAC Technician
Category: HVAC
Satisfied Customers: 852
Experience:  I have been an HVAC/R mechanic/technician for 30+ years.
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I have a E200 trouble call on my furance, It is new and why

Customer Question

I have a E200 trouble call on my furance
JA: Did you check the furnace's filters?
Customer: It is new and why would that lock out the gas valve?
JA: Do you plan on doing the work yourself?
Customer: yes if I can
JA: Anything else we should know to help you best?
Customer: no
Submitted: 4 months ago.
Category: HVAC
Expert:  Brian HVAC Guy replied 4 months ago.

Hi I'm Brian and I'm here to help!

If this is a Lennox furnace, the 200 error code is a roll-out switch tripped and it will lock out the furnace from firing. A rollout switch detects when the flame from one or more of the furnace's burners has rolled out of the burner tube (venturi). On a new furnace, I would suspect a venting problem with the flue or possibly a poorly installed vent cap and a high wind blowing back in the vent. It could also be a clogged exhaust vent (flue) or gas pressure issue. Other causes are a dirty heat exchanger but that's not likely in your case.

Rollout switches are manual reset. Click Here for a link to a typical one for sale with a good picture of what it looks like. You can see the little red reset button in the middle of it. These are located right near the burner nozzles on your furnace. On high efficiency models, you may have to remove a panel cover over the burner assembly to locate it (them).

Let me know if you have questions about this.

-Brian

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