In my shower the cold water works but when I turn on the hot water nothing comes out. The hot water works in the other bathroom and all sinks. Please help. Its was 2 degrees last night could it be frozen?

2 degrees? Too cold for this Florida cracker but I don't think it froze up half of your shower valve. I need am little more information. Is this a one handle or two knob shower valve? What brand is it? How old? Back to you, Tom

It's a two handle valve. I removed the valve and the washer in side looked fine before I but it back together I I turned the main water back on with out the handle valve and still no water. Last night I placed a space heater in the bathroom for 3 hours to worm up the pipes and no luck. The home is 25yrs old I don't know what brand of shower.

Unless this is an outside wall, not very common, the pipes should not freeze. Be very cautious when dealing with a frozen pipe, they frequently expand and break but do not leak until they thaw. So you removed the valve, I am thinking you took out the cartridge, can you tell us a brand or post a picture?

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I I turned the main water back on with out the handle valve and still no water.

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Does this shower have shut off valves on the supplies? Is the shower bon a outside wall? Back to you, Tom