Upstairs system. Tech found a tripped SS2 switch which is located in the primary drain line between the airhandler and the P-Trap. Tech flushed out the drain and observed for proper draining. Positive pressure airhandler has no vent after the P-trap, costumer has had history on the drain being a challenge. Tech looked at the drain line the crawlspace and does appear to have a section where it is not supported, which is causing the drain to go slightly uphill as it gets near the exit point, tech also recommends having a EZ-trap installed. Findings and recommendations where informed to the homeowner and tech provided an estimate for the EZ-trap. Costumer will call when they are ready to move forward with the recommendation. Drain line about a positive pressure system will be informed will be to the office for review. System was draining upon departure but liable to trip again. Both prices are on the same estimate.