Brew Not Heating
- Give the machine sufficient time to heat up. A heating time of 20-30 minutes is recommended for prosumer style machines for it to be sufficiently heated for brewing. Make sure the portafilter is attached during heating.
- Make sure the heating indicator is on. If the heating indicator is not on, then the machine will not heat. Typically this light will be off if the machine is out of water or not able to fill the boiler.
- The pressurestat may be set too low resulting in a lower temperature. Be cautious when adjusting the pressurestat. Setting it too high can cause the machine to overheat, resulting in the pressure relief valve blowing off excess steam.
- Unplug the machine and remove the machine case.
- Once the case is removed, locate the Mater pressurestat, which will be located behind the boiler on the left hand side of the machine.
- The adjustment screw for the pressurestat is located on the top. To adjust the pressure, turn the screw a quarter of a turn at a time, a small adjustment will make a large change in steam pressure and brew temperature. Clockwise will raise the pressure, counter-clockwise will lower it. Bear in mind that on this machine the steam pressure and brew temperature are correlated, and one can't be changed without affecting the other.
- The high limit switch may be tripped and needs to be reset.
- The heating element may be broken and may require replacement.