Hi Mike I answered your questions below with the text that is underlined.Please let me know how else I can assist.ThanksToddWhole Latte loveI've got a slow drip out of the E61 group. I've got an intermittentgurgling sound in the bowls of the machine. I get an occasional overpressure of the steam boiler, which causes the pressure relief valveto open. And, lastly, if I've left the machine on all day, when Icome home from work and pull a shot, I hear one of the boilersrefilling (not sure which one) before the shot will start. I also notewhat appears to be more water than normal in the drain pan.Today I pulled the cover off, started up the Brewtus from "coldirons", and watched what happened.1. The steam boiler heated up normally. Once up to pressure, the heatcycled on at about 1.2 bar and off at about 1.4 bar. I noted that thedripping from the E61 group started once the boiler hit about 1.1bar. The dripping was continuous after that. The dripping was fromthe bottom valve of the E61 group with the handle in the full-downposition. If I put the handle in the mid position, the dripping willcome from the portafilter.The cylingin on and off at 1.2 and 1.4 bar is normal. There is a problem with a seal in the bottom part of the brew group. You can unscrew the big nut under the brew group and then the little one, take it all apart and clean it. You will see the rubber seals, make sure they are clean. If after you check and clean it it still leaks it will be time to replace them. 2. The water boiler heated up normally after the steam boiler came upto pressure. The water boiler reached 95 and then the water and steamboilers cycled on and off normally to maintain temperature/pressure.3. The gurgling sound appeared to emanate from the steam boiler.While listening to the noise I noted bubbles going through the plastictube between the heat exchanger outlet on the steam boiler and theinlet on the water boiler. If I disconnect the pump control switch(so that the pump will not come on with the handle in the full-upposition), the gurgling sound increases appreciably, as does the flowout of the portafilter. Eventually the flow will go to nothing butsteam. The plastic tube between the steam and water boilers will havenothing but steam in it. If I re-engage the pump, water will againflow through the plastic tube, but it will take 10-15 seconds to getwater flow at the portafilter.The gurgling is caused when the brew boiler looses water. My guess is that the water being lost is the water that is coming out of the bottom tube on the E61 Brew group. When you take care of this the gurgling will stop.4. I get random occurances of over-pressure on the steam boiler,resulting in the pressure relief valve opening at around 2 bar. Thereis no apparent pattern to when this will happen.It is time for a new pressurestat.5. My habit patter when I pull a shot is to first pre-heat my cupwith water from the steam boiler and then pull the shot. When I comehome from work (Brewtus has been left on all day) and open the valvefor hot water to pre-heat my cup, I'll get immediate flow of hot waterfrom the wand, but then I'll hear one of the boilers refilling forabout 20 seconds. I'll also note that the drip tray seems to havemore water than expected from my normal routine of shot pulling.I had thought that perhaps there was a crack or a pin-hole in the heatexchanger which was allowing boiler pressure and steam to migrate intothe water boiler and group head. However, if I put a blank in theportafilter and run the pump, I do not see a concurrent increase inpressure in the steam boiler, which should occur if there were a crackor hole in the heat exchanger.I'm stumped. Hope you can help. I figure the p-stat at a minimumneeds to be replaced, but the dripping and gurgling and waterconsumption has got me scratching my head.It sounds the like the two problems you have with the water leaking and the overpressure events are the only problems, everything else sounds like it is working perfectly. If you would like I'll contact our tech support folks and they can set you up with a new pressurestat. Let me know.Sincerely,Mike
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