Heating problem

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  #1  
Old 01-01-01, 05:44 PM
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Unhappy

I have a gas forced air furnace, Inter City Products, 1992. It is not heating. It is giving a error message (3 flashes of a red light) which means "pressure switch contacts open" I located the pressure switch,turned off the furnace, tapped lightly with a screw driver on the pressure switch, turned the furnace back on, and the system fired up and is heating. Not sure if it will make it through the night.

Do I need to replace the pressure switch or could there be something else wrong?
 
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  #2  
Old 01-02-01, 05:08 PM
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Make sure

Make sure the lines going to he switch are clear.The switch operates at a very narrow margin.The slightest restriction can prevent its operation.Along the same lines>>>>this switch has cycled your furnace on and off many,many times in the last 8 years and may be ready to be replaced.PDF

 
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Old 01-02-01, 05:42 PM
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Smile

Thanks for the advice, you were right on. The vacuum line that runs from the blower had some moisture and had rusted the tip of the fitting. I cleared it out and it fired right up.
 
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