Goodman "pressure switch stuck open" indicator
Your pressure switch is not operating properly because either
the switch is failing in such a way that it now requires more vaccum than the ID can provide
The ID is providing less suction that it originally did.
In the field a T'ed manometer test compared against the ratings on the PS and the ID tells us which is which.
ID problems can include debris inside ID PS outlet/ restricted vent or intake/ missing ID blades (usually creates noice)/ fan loose on ID shaft/ failing ID gasket to furnace/ failing outlet restrictor plate/ exchanger crack/ failing ID motor causing reduced rpm/ run cap if it has one/ PS hose being cracked, split or too severley bent/
Last edited by how; 10-09-2012 at 01:42 PM.