My Moen soap dispenser at my kitchen sink has stopped working. It will not create a suction to allow the dishwashing soap to come out. How do I fix it?

Please read this and try as suggested,

https://www.askmehelpdesk.com/plumbing/moen-soap-dispenser-stopped-pumping-soap-115129.html

OR

https://www.bing.com/videos/search?q=moen+soap+dispenser+at+my+kitchen+sink+ha s+stopped+working.&FORM=VIRE1#view=detail&mid=C1BE4816B5389D47FF66C1BE4816B5389D47FF66

https://www.bing.com/videos/search?q=moen+soap+dispenser+at+my+kitchen+sink+ha s+stopped+working.&FORM=VIRE1#view=detail&mid=CD88775BCDA45687F5B0CD88775BCDA45687F5B0

These soap dispensers get eventually clogged with hardened soap. Remove the top, put it in hot water and clean the passages. Reinstall. You may also remove the bottle which is mounted from under neath and wash it clean. Use only thin soap.

Hope that helps

Milo