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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.
I have been searching the Internet for solutions to my problem which is that I get no hot water from my LDR Tuscany Brass
Anti-scald, Pressure Balance Single Handle Tub and Shower Valve. I've
determined that my manual does not match my valve exactly but I've been
able to extract the cartridge and look at the insides. This valve was
never in active use since installation so there was no mineral
build-up. But a couple of years ago, our city mistakenly turned off our
water shut-off valve in the street while trying to find a leak. Rust
and particulates came rushing through our water supply pipes and
contaminated almost every faucet we have so I think something might have
happened to this valve at that time. Does anyone know if those screws
on each side of the center of the valve are truly just "stop valves" and
might be clogged up throwing off the balancing mechanism?
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There's a pressure-balance piston in the valve that mixes hot and cold water. That's gotten stuck. Take the handle and the cover plate off and look for a removable cap on a chamber that's going horizontally across the valve. When you find the piston and get it out of the valve, use fine emery cloth to polish it up - get any corrosion off so it slides freely in the sleeve. That will solve this problem. If you can find a service manual for the specific faucet it may be more descriptive about where to look for the pressure-balance piston.
These types faucets have a what is called an anti scald valve build into them, it is required by law, it is either defective or out of adjustment, contact a local hardware store for more detailed info.
The spool and sleeve, the part of the Scald-Guard pressure balance valve that blends the hot and cold water, is not working properly. This can is caused by mineral deposits that build up over time resulting from hard water. To fix this, follow the steps below based on your model.
Shut off water supply.
There are two types of valves. Choose one or the other below depending on your series.
1300-1400 Series: Remove handle.
1700-1800 Series: Remove temperature knob, cover and handle.
Twist and pull sleeve to remove it.
Unscrew brass bonnet nut.
Remove cartridge.
Soak cartridge in a 50/50 vinegar and water solution for 24 hours to remove any mineral deposits.
**NOTE** Unless both hot and cold water supplies are turned on, the pressure balance valve will allow only a dribble of water to flow through the valve.
I have put up a picture to make disassembling it just that much easier for you.
probably have a kink on how water line feeding valve..if possible to cut drywall bhind tub valve and inspect pipe at bottom plate...moen faucets are equipped w/ anti scald device, pressure balanced (newer models) and this could cause cold water to overwhelm hot water...
I have been searching the Internet for solutions to my problem which is that I get no hot water from my LDR Tuscany Brass
Anti-scald, Pressure Balance Single Handle Tub and Shower Valve. I've
determined that my manual does not match my valve exactly but I've been
able to extract the cartridge and look at the insides. This valve was
never in active use since installation so there was no mineral
build-up. But a couple of years ago, our city mistakenly turned off our
water shut-off valve in the street while trying to find a leak. Rust
and particulates came rushing through our water supply pipes and
contaminated almost every faucet we have so I think something might have
happened to this valve at that time. Does anyone know if those screws
on each side of the center of the valve are truly just "stop valves" and
might be clogged up throwing off the balancing mechanism?
check ur anti-scold setting when shipped from factory unit is set cold install instructions always advise about adjusting to suit your comfort--remove handle and using the blue & red adjustment tabs set the heat to your desired comfort
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.
You may have to disassymble the faucet to see if there is something that is stuck in there or that the assymbly internally is stuck in the closed position.
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