Performed a three system maintenance checking heating. Checked all electrical, mechanical and safety components. Cleaned flame sensors checked filters, checked gas pressures, checked heat exchangers and amp draws. All systems are operating properly at this time. I did find that on the downstairs system the burners were clogged causing only one of the three burners to come on. Cleaned out Orpheus and burners would now lite. Homeowner wanted to hold off on air scrubbers and surge protectors.