RUUD or similar gas furnace error - fault code 45 explained

RUUD or similar gas furnace fault code 45 explained.
What to do when error code 45 appears on the RUUD or similar furnace control board?
Failure of the low pressure switch in the gas furnace.
Disclaimer.
This video show wiring of the part of the house for "handy" homeowners who wants to perform house improvement by themselves.
This video is based on years of practice as an electrician and also on best of my knowledge of the National Electrical Code (NEC).
I do not take responsibility for any misinterpretation of the video, and any mishaps during and after work done based on this video.
If you feel any discomfort to perform DIY job, call the professionals.
Remember that ELECTRICITY IS DANGEROUS!
Any accidental touching of any live parts of the circuit may cause electric shock which may be fatal!
Always de-energized circuits before work on it, if it is possible!
Always follow national, state and local codes.

[@kylefelton1]

Thank you for the info. Error code 45 immediately displayed once the draft blower turned on. Low pressure switch did pass the ohm test. However, when I jumpered the low pressure switch, the furnace kicked on and ran normally. Upshot: Don't blindly trust the ohm test. New low pressure switch on order, but at least I have your workaround to keep the place warm.

[@gtwozero]

I got code 45 on my Rheem R96V Series Furnace. Followed all the steps in the video and worked like a charm. I was able to keep the house warm till the new switch was shipped. Thank you!

[@johng2913]

Good to hear

[@GuoatSpace]

Well explained, very helpful. Thank you.

[@ScottSlayden-v2s]

It sounds like if you use the clips you’ll throw a code 44?