Re: Problems with Wega Mininova, semi-automatic espresso machine, 5 years old

Yo K I'll bite. The machine needs a control unit. Sound like you got
some oddball advice from those EPNW kids ;-)

Terry Z
bikelme@xxxxxxxxx wrote:
In the past few days this problem has developed:

When the machine gets to operating temperature, neither the brewing
water nor the hot water functions will work. For a couple of days this
problem was intermittent, and cycling the ON-OFF switch, and/or the
brewing water switch appeared to fix the problem. Now cycling the
switches does not fix the problem.

Further information:

Turning off the main switch and letting the machine cool down restores
both the hot water and brewing water functions. In fact, as the
machine warms up from the cold state, the hot water and brewing
functions work until the machine reaches it's equilibrium
temperature.

I spoke with the technician at Espresso Parts NW, and he suggested
stuck solenoids. He said that the solenoids tend to warp over time and
get stuck, and that I should bang the solenoids with portafilter to
free them up. I gave them the calibrated whack a few times, but this
does not seem to be the problem. The switches are also suspects I
believe. I am wondering if there is a thermal cutoff switch that is
malfunctioning?

If anybody out there can help with ideas for diagnostics, an electrical
schematic diagram, or any other information, I would appreciate
feedback. Also, I would like suggestions for espresso machine repair
in the San Francisco-East Bay area.

Many thanks.

M. Buettner

.

Relevant Pages

  • Re: Problems with Wega Mininova, semi-automatic espresso machine, 5 years old
    ... I know that diagnosing a problem over the phone ... water nor the hot water functions will work. ... brewing water switch appeared to fix the problem. ...
    (alt.coffee)
  • Re: Cleaning/water intrusion
    ... Your electrical wiring harness connectors are probably not sealed at ... "Swamp area" is a term we used on aircraft. ... But the shop towel got soaked with water when I rode in the wet. ... switch and the reserve tank switch that Yamaha uses instead of having ...
    (rec.motorcycles.tech)
  • Re: Water Flow Meter
    ... I have an AC unit that uses water to ... trying to build a setup that will switch between the on demand hot ... (i.e. pump is on and working.) ... Automatic Shower pump? ...
    (sci.electronics.repair)
  • Re: RO/DI unit
    ... my kitchen from water spilling out of overflowing bucket full of RO/DI water... ... I use this one: http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=4533 It is called "float valve kit" and consist of a float valve, pressure cut-off switch and some plumbing to add it to your system. ... It works this way that the floating switch closes the clean water *outlet* from the filter, this in consequence build up the pressure in the outlet line, this is acting on the pressure switch which is cutting off the tap water supply. ...
    (rec.aquaria.marine.reefs)
  • Re: Water analysis results
    ... The only useful info are the sodium and chloride values. ... the water is very soft. ... terms of brewing water. ... Ward Laboratories is one of the best testing labs in the ...
    (rec.crafts.brewing)
Loading