Voyager Water Heater locking

My Voyager water heater is in the flashing loc position all the time even after i reset it. Along with that the Pressure Switch light is flashin and when I look at the key to see what it means it says to combustion air failure. Call service. Press Button to Restart Now do all I have to do is get a new pressure switch? if so, where? Thanks guys. Probably igniter element. you can order online by googling the part # (0206FF003) and it's easily replaceable. It's between $50-80 I think the Voyager has been discontinued... your on the right track, the unit has to prove that it is venting and it does that thru the pressure switch, the pressure switch closes and then the ignitor is powered. try this,remove one end of the hose leaving the other end connected to the pressure switch,blow thru the pipe then suck back-you should hear the switch click. then find the hose/tube that should connect to your vent motor,remove it at that point and at the pressure switch-blow thru it from the top, if condensation is in this line you will blow it out, check your exhaust vent for any blockage. the flashing loc is lock out. this means the unit tried to fire a preset number of times (usually 3) and shut down--meaning you may have to reset the power once you troubleshoot your unit.....if the pressure switch doesnt click or have continuity then is will need to be replaced....the reason for sucking and blowing is that some press switches operate of positive press and others on neg press.....

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