Have HVAC Questions? Ask an HVAC Expert for Answers
Hello and thanks for using this service, if you have been waiting do not worry or get upset I am just one of the techs on here and I try to get to as many customers as I can and I just picked up your question now.
Have you tried to turn the power off to the unit for a minute and turn it back on to clear the code?
That code is a low pressure code what is the system pressure?
Yes that is low can you add water to the system to raise the pressure?
Somewhere in your system you have fill valve/prv and a back flow preventer. It usually connects between the expansion tank and air eliminator. There is a lever that will allow you to manually add water to your system. If adding water to your system becomes a regular event, you have a leak that should be addressed. Adding a gallon or so a year is not such a big deal. You need about 18-20PSI...if you have a big leak you have a bigger issue just so you are aware.
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