By reading the manufacturers directions
No conversion, it would need to be replaced with a single handle faucet.
Generally, the handle needs to be removed either by popping a single tab off the center of the handle, or removing a set screw from the side. Once the handle is removed, there will be a plastic ring through which the center post connects the handle to the valve. This black ring and be pulled out, and rotated to raise or lower the maximum temperature setting.
Thermostatic shower valves were designed for safety, which allows the regulation of the water to within a half of a degree of the selected temperature. The most common thermostatic control is a single - handled 3/4 valve.
Moen part #1920 and a brand new Moen single handle faucet
Look under the handle for a small ALLEN SCREW (hex head). Loosen it and slide the handle off.
First make sure that the hot and cold supply lines (the plumbing) aren't backwards (hot should be on the left as you are facing the faucet) or that someone accidentally ran two hot lines. For the problem to be in the faucet itself you would have to have a single handle faucet. If this is the case the control valve is broken and should be replaced. Three handle Left= Hot Water Flow. Right= Cold Water Flow Center= Controls whether the water comes out the shower head or tub faucet. Two handle Left= Hot Water Flow Right= Cold Water Flow (Diverter Valve is elsewhere if it's a tub/shower) Single handle One handle controls both water pressure and temperature
First off - be on the outside of the shower and screw with it clockwise and anticlockwise and see what happens. Works every time.
Sounds like you hooked up the the supply lines backwards .
need universal handles for Bath & Shower, they will replace old style American Standard, need a handle with an adapter to fit different size stems. Preferable modern style handles if possible
On single handle shower valves, designed to let cold water first and turn handle farther to mix hot water to desired setting. If hot water turned on first, possibility of getting scalded. If seperate hot/cold handles for shower, shower valve needs work.
3/4 turn