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Old 01-26-2014, 11:40 AM   #1
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pressure switch

i am having ongoing troubles with my pressure switch.
furnace model # tappan/nordyne L1RA 072C 12B
the trouble is the electrical connection. i can mess around with it and get the furnace running again. i had to last night.

so i want to get a new one, and terminals.

i am looking at them. there are part #'s that are close to mine. but they have different color "dots" on them. what do these mean and are they interchangable ?
i am thinking not, but just asking.

nordyne pressure switch 632432

while i am at it. can you recommend replacement that i can buy ? to have on hand, for the next failure. i am looking at the HSI. but what about the sensors ?

yeah, i know i asked this before. but i am asking again.


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Old 01-26-2014, 12:29 PM   #2
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Not sure what the dots are. It MUST match the OEM specs and that has to do with the " inches water column WC rating. also the mounting can be a problem if you do not get the OEM part. try

if you get it from Nordyne the inches WC may be slightly different and that is OK because they have tested it and got it approved for the gas code and UL.


"Cut it twice and it is still too short".

Last edited by yuri; 01-26-2014 at 12:31 PM.
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Old 01-26-2014, 07:58 PM   #3
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I looked at different images and looks like it does coincide with different pressure ratings for the switch. So make sure you order one with same rating / "w.c. To prove the fan is operating and flue is moving the desired c.f.m. (Cubic foot of air per minute) of air.
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