has anyone ever run across this type of problem. Taylor model 339 soft serve machine, vanilla (left side) won't stand up, soft appearance. product temperature is 15 degrees, normal should be 18 to 20 degrees.suspected mix being used was bad but same brand was in chocolate side (right). liquid mix best before date still good. suction is 18 p.s.i. as per specs, head is at about 240 p.s.i., frost back just to suction service valve, and both compressors have the same operating characteristics. refrig is R-502,as far as I can determine, scraper blades are new, barrel frost pattern with no product is the same for each side , no visible difference. can someone tell me how I can have product colder than it should be but it won't stand up. any input would be very useful. thanks.