Bar called complaining about foamy beer. Checked glycol chiller system out and everything seemed to be working fine. Found walkin cooler where kegs are stored at 50 degrees however. Very old equipment, so replaced evap and condensing unit. Walkin now at 40 degrees but beer still foaming and too warm at tap. Glycol pump in walkin is running and I verified that there's glycol in system but dont know if there is enough or maybe it has degraded to a point where its just not transfering heat properly. I don't usually work on these draft line systems but beer company refuses because they didn't install it. Its some kind of home made job done by previous refrigeration guy who just worked for beer. To his credit it did produce supposedly 34 degree beer at tap however and now there getting only 40 degree beer.
Any sugestions gentlemen.