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the anti scald is adjusted too low. its located under/behind the handle. it usually has am allen wrench head. remove the handle and adjust it all the all the way to hot that should fix it. on some models you can remove the entire thing,but on some that will cause the handle turn 360deg because in some models its also the stopping point of the handle. hope this helps
Anti Scald Valves have an adjustment under the handle (remove handle) to allow so much hot water in no matter how far handle is turned. Its possible that the adjustment is set to allow only hot water in, this of course defeats the purpose of anti-scalding. Check to see if you can adjust this back. Good Luck have a Great Day. Please give a 4 THUMBS UP if this free answer was of any help.
Your valve has an anti-scald feature which automatically adjusts the water temp if cold water is diverted to another location, e.g., a flushed toilet, washing machine filling, etc. Most valves have an adjustment screw to allow you to set the temp. Since each manufacturer is different you'll need the manual or contact the manufacturers support. BTW, these anti-scald valves are being added to building codes in many parts of the U.S.
Remove the handle,and all the trim rings,and the cartridge cover. take a flat head screwdriver and use it to lift up the red ring behind everything, this is the hot limit safety stop, this just stops the handle from turning to full hot.
Once you have the red ring lifted up, notice the numbers and the pointer on the ring, numbers are on the fixture,
O= hottest 7=cold
See what the ring pointer is set to now, and move it half, before you put this back together, just set the handle on the unit and run the water to see if its to hot or not enough. Once you have found what is the best setting, then replace all covers and trim, handle.
Your Moen valve is equiped with an anti-scald device (as part of the valve cartridge) which prevents someone from getting scalded by hot water if there's a sudden demand for cold water, i.e. a toilet flush, washing machine filling, etc. Fortunately Moen stands behind their products and will provide a new cartridge.
Contact Moen and describe your problem.
if you have anti scald device installed in the valve, take it out. the anti-scald device is to keep the hot water from pouring out in case the cold water pipe is not functioning. In general sense, it is a good idea, however, it also mixes too much of cold water, therefore you don't get eough hot water.