RUUD furnace won't start with burner door on


Old 01-04-16, 06:36 AM
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RUUD furnace won't start with burner door on

hey all, i have a 7 year old Ruud NG high efficiency (92.9) gas furnace (model UGFD-07EMCKS).
it has worked well up until this year. i went to turn it on for the first time this year and it wouldn't start.

After a few diagnostic steps it seems that it will only start with the burner door off. Once it fires up, i can put the burner door back on and it will continue to work fine until it reaches temp, shuts down and then the next call for heat - it just won't start if the burner door is on.

I have checked both pressure switches by removing the hoses and gently blowing and inhaling and i can hear clicking. I have removed the flame sensor and cleaned it for oxidation. I do have an error code on the main board of "57" which lists as "Contacts Open - inducer high".

any suggestions?
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Old 01-04-16, 10:34 AM
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Welcome to the forums.

Do you have two PVC lines connecting your furnace to the outside air ?
Have you checked them for possible blockages ?

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