Call Grohe customer service and tell them to send you a free replacement part and instructions/diagram: grohe:

Residential Products: We provide the following warranties on all GROHE products to the original purchaser, installed in a residential setting. This warranty is effective for all faucets sold after January 1, 1997. Mechanical Warranty: A Limited Lifetime Warranty is provided on all mechanical parts to be free from manufacturing defects in materials and workmanship under normal use for as long as the original purchaser owns their home. Finish Warranty: A Lifetime Warranty is provided on all GROHE product finishes to the original purchaser against manufacturing defects in materials and workmanship

Answer from Jimmy Fix-it on Stack Exchange
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JustAnswer
justanswer.com › plumbing › iolhq-grohe-kitchen-pull-spray-head-faucet-not-sure.html
Grohe Faucet Stuck in Spray Mode? DIY Fix & Troubleshooting Guide
Pull down spray head stays stuck on spray. I have a grohe zedra kitchen faucet. I got a replacement spray head. It is · I have a Grohe 33330 dual spray, pull out kitchen faucet. ... Disclaimer: The customer and expert messages presented herein may have been altered or modified to enhance readability and safeguard the privacy of individuals. These modifications do not change the intent or substance of the original messages. ... Spray head button sticks or fails to reset after water is turned off.
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Hunker
hunker.com › 13417692 › how-to-fix-a-grohe-faucet-spray-head
How To Fix A Grohe Faucet Spray Head - Hunker
March 10, 2022 - Before you get too focused on tackling ... elsewhere in the faucet. To remove the spray head, hold it in place with one hand and twist the cap above the spray head counterclockwise....
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Ehow
ehow.com › home sweet home › home maintenance & repairs
How to Troubleshoot a Grohe Kitchen Sink Pull Out That Won't Switch From Stream to Spray | ehow.com
July 8, 2011 - Remove the button lever and blow out the button cavity with a can of compressed air. Mineral deposits or other debris can become lodged in the mechanism, preventing it from operating properly.
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Fixya
fixya.com › home › forum › plumbing › grohe
SOLVED: My grohe faucet is stuck on the stream spray and - Grohe | Fixya
August 29, 2018 - does the faucet have an aireator on the end of spigot. if so remove by turning off with pliers, and see if it is blocking the water. if it is, clean aireator and replace if necessary.
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Reddit
reddit.com › r/plumbing › grohe kitchen faucet switching unexpectedly from stream to spray flow
r/Plumbing on Reddit: Grohe kitchen faucet switching unexpectedly from stream to spray flow
April 12, 2022 -

Question from a non-plumber about our Grohe kitchen faucet. It has a pull-out sprayer with buttons for stream and spray flow. In the past month, it's started to switch from stream to spray unexpectedly. This happens while water is flowing. The cadence of these switches has been increasing as well. Any ideas on the root cause? Any additional info I can provide? Some pics below.

This video shows everything working properly.

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Upgradedhome
upgradedhome.com › home improvement › kitchen › kitchen faucet stuck on spray mode? (here's what you can do)
Kitchen Faucet Stuck On Spray Mode? (Here's What You Can Do) | Upgradedhome.com
If your kitchen faucet is stuck on spray mode, you probably have a faulty diverter, clogged screens, or a faulty spring. By changing or adjusting these parts, you can solve the issue and get the kitchen faucet out of spray mode.
Published   August 18, 2022
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YouTube
youtube.com › watch
Grohe Bridgeford Kitchen Faucet Spray Head Fix - YouTube
Grohe Bridgeford Ladylux Spray Head FixSpray Head 46173 000 (last 3 digits are the finish)-New Part (46173ENO) ~$150-Alternative O-Ring Fix (13.7 mm Inside D...
Published   January 3, 2020
Find elsewhere
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YouTube
youtube.com › hosee plumbing - san francisco
How to Fix - Grohe kitchen faucet sprayhead issues - YouTube
This is a video I took showing you guys how to remove/repair a Grohe kitchen faucet sprayhead diverter.This specific sprayhead I believe is used in the Grohe...
Published   September 6, 2023
Views   9K
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Milkwood
milkwoodrestaurant.com › how-to-repair-grohe-kitchen-faucets
How To Repair Grohe Kitchen Faucets, Superb 4 Reasons And Solution Why This Is Happen
The only option in some cases is to obtain a replacement faucet head from the Grohe website. If the check valve and flow restrictor pass your inspection but you can’t change the output from spray to stream, you’ll need to replace the spray head. It’s impossible to fix an adjustment button on your own.
Published   November 28, 2021
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GROHE
grohe.us › bathroom-faucet-fittings-and-spare-parts › pull-out-spray › grohe-stainless-steel-brushed-46312sd0
Pull-Out Spray
Pull-Out Spray
For kitchen faucets 33 727 / 33 707 / 33 933 · Finish GROHE RealSteel · Compare · Universal (GROHE) Compare · Product Overview · Products using this part · Installation · Ask an Expert · Diverter: aerator/shower jet · Automatic return to aerator · For kitchen faucets 33 727 / 33 707 / 33 933 ·
Price   $102.90
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Reddit
reddit.com › r/plumbing › issue with aerator button on grohe kitchen sink faucet
r/Plumbing on Reddit: Issue with aerator button on Grohe kitchen sink faucet
August 21, 2021 - I had an issue with the spray nozzle being stuck on my Grohe kitchen sink faucet. It had both the spray and regular stream on at the same time (the stream was lighter pressure. We've been dealing with the spray not turning on all the way before this happened today but could just have the regular ...
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JustAnswer
justanswer.com › plumbing › mcg6q-kitchen-faucet-button-change-water.html
Kitchen Faucet Button Issues? Expert Troubleshooting Guide
The noise and stuck shower mode likely stem from a faulty diverter valve inside the faucet head. Mineral buildup or worn internal seals can cause the button to stick and produce sounds.
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Allied PHS
alliedphs.com › blog › grohe kitchen faucet spray head repair & cleaning
Grohe Kitchen Faucet Spray Head Repair & Cleaning
November 26, 2024 - This guide can help you determine when it’s time to clean or replace your Grohe spray head and provide you with step-by-step instructions on how to do it. ... A kitchen faucet is a sink fixture that helps the user control water flow. It also helps regulate water temperature.
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Sunrise Specialty
sunrisespecialty.com › sunrise specialty › 8 pull out spray kitchen faucet problems (causes & fix methods)
8 Pull Out Spray Kitchen Faucet Problems (Causes & Fix Methods)
December 15, 2022 - First, check that it isn’t a problem with the hose weight or the hose being snagged, as in #1 above, because if the hose isn’t retracting properly, it can mean the spray head doesn’t get pulled back into the cradle the way it should. If this isn’t the root of the problem, it may just be an issue of normal wear and tear. Since a pull-out kitchen faucet has moving parts, it will inevitably wear out with time.
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Stack Exchange
diy.stackexchange.com › questions › 65955 › problem-with-ladylux-kitchen-faucet-sprayer
Problem with Ladylux kitchen faucet sprayer - Home Improvement Stack Exchange
I have a 14-year old Grohe Ladylux kitchen faucet. Recently, the spray knob stopped working properly. Normally when you press and release the knob, the faucet goes to spray mode until you press the release knob. Now it only stays in spray mode if you continuously hold the spray knob down.
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TCK
oltsw.com › home › posts › kitchen supplies › how to troubleshoot grohe touchless faucet that’s not working
How to troubleshoot grohe touchless faucet - Xiamen OLT
January 5, 2024 - A Grohe faucet that is stuck on spray may be caused by problems with the diverter or issues from the faucet nozzle.
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Aleashafaucet
aleashafaucet.com › blog › kitchen-faucet-spray-button-stuck
Unsticking Kitchen Faucet Spray Buttons: A Comprehensive Guide to Easy Fixes - Aleashafaucet
March 11, 2024 - Sometimes, the button may become stuck due to a broken or misaligned internal component. If you notice any visible issues with the button mechanism, you may need to replace the spray head or the faulty parts to resolve the problem.
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Gotonovofaucet
gotonovofaucet.com › home › blog › unsticking the stuck: how to fix a kitchen faucet spray button
Unsticking the Stuck: How to Fix a Kitchen Faucet Spray Button -
May 17, 2024 - Using a wrench or pliers, carefully unscrew the aerator or nozzle assembly located at the tip of the faucet head. This component often houses the spray button mechanism and may be secured with a threaded connection or a retaining nut.