Grundfos MQ3-45 stops and starts intermittently when tap turned on but not every time could it be the pressure switch is starting to fail ?????

SOURCE: Pressure washer intermittent turn on

sounds like a pressure switch is sticking. usually causes this problem especially after being stood for a while not used.

have to remove cover to get to pressure switch, remove pressure switch piston clean regrease with silicon grease refit it m and all should be good.

SOURCE: switch clicking on start up wont start lights flash at same time

tried the battery, charge it manually, sounds silly but i had this problem with my 600ss
thanks

SOURCE: 2006 colorado intermittently fails to start. It

Clean all the electrical connections you can get to under the hood with automotive electronics cleaner,dry with compressed air and pack each connector with di-electric grease.

SOURCE: Pasquini. Livia 90 intermittently building up too much pressure

The part that will solve your problem is an upgraded heating rewire kit which will control pressure electronically, not manually. The rewire kit is Part #90000, $28

You may also need a new micro switch which is connected to your PStat with the rewire kit. The micro switch part #7633905, $13

These parts are in stock. I can send you these parts and instructions to install these parts in your machine.

My experience is working over 10 years at Pasquini as a master technician running the home repair sales and service center.

I stock all Pasquini parts for any service of your Pasquini espresso machines and grinders. Contact us for any of your Pasquini sales and service needs.

SOURCE: grundfos mq3-45 pressure booster pump

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