fuel flow from the internal tank is gravity flow to the fuel sump. check for ANY blockage or kinks in the tank to sump fuel line. if the tank is vented check the vent to be clear. the click, click, click indicates a starved fuel pump. in the very bottom of the fuel pump is a stainless steel screen. use gumout carb cleaner to clean this and all screens. gumout will NOT destroy the plastic. items that cause you to get warning lights are: no fuel, no flame, shorted flamerod, system lockout condition. what causes system lockout are: too much fuel, not enough fuel, system overheat, faulty microprocessor. unfortunately there is no way a user can troubleshoot the microprocessor without specialized equipment. please go to the main forum and look for ILLUSTRATIONS. in here is a sub directory called monitor heater repairs ( forget the sub-directory) go to the sixth thread and download the monitor manual. here is a flowchart type of troubleshooting manual. pages near the end have blown up diagrams of the 22, 41, 422 heaters with spare parts lists.
I don't see why Al Luce just doesn't remove his website. Its useless and doesn't accomplish anything just a bunch of hype. He was supposed to have an online video for monitors (which he constantly badmouths) although at one point that was all he could talk about as being the most efficient type of heater and made him a bundle. what bearing his cat has on the site is beyond me.