came out because the customer was concerned about her air flow. I checked the ductwork and everything was fine except for the return duct she had closed or blocked off. I checked the filter and it was completely compacted no 90 percent blocked. The condensate pump line was disconnected and the unit was draining on to the floor of the crawl. I replaced the filter and installed a new condensate pump and the system is now working according to specifications. The customer is now a Home Care member and will have her system maintenance through us routinely.