Frig ice maker just quit. It is a side by side w/door dispenser. The H2O works. Anything that I can check before calling the repair man

Yes, Check the folllowing things in this order:

Make sure the plug where the ice maker plugs in inside the freezer isn't loose. Sometimes just unplugging and re-inserting the plug will fix it. If ok, read on...

You'll need a good flashlight. Open the freezer door. Remove the ice bucket. Shine the flashlight at the water inlet and chute to the ice maker and check for an ice clog. This is the point at which the water enters the ice maker. If you see an ice blockage, you can thaw it out with a hair dryer, but be careful not to get things too warm or you can warp plastic parts. If your unit has a water chute, remove it first and thaw it out separately.

Next, if the above isn't the cause, pull the machine away from the wall, follow the water line on the back of the unit down from where it enters the freezer compartment, and it should lead to the water fill valve. Remove the back cover or panel. Make sure you have water coming to the valve. You can loosen the fitting to the valve from the water supply slowly with a pan under it to catch any water that may come out. If water pressure is present, it could be the valve or on some units, an inlet screen to the valve may be clogged. If no water, then there's a problem with the supply somewhere, but this isn't as likely because you said the water dispenser works. You will need to turn off the water to the appliance before going any further. After the water is off, remove the inlet fitting and check again for water pressure. If ok, look at the inlet to the water valve and see if anything is clogging the valve. If so, clean it out, re-connect everything, and turn the water back on. Check for any leaks. Open the freezer compartment and cycle the ice cut off arm (move it up and down carefully). Wait several minutes to see if the ice maker fills with water. You should hear a click at the water fill valve. If it does work, discard the first round of ice cubes because you had the water line off and the ice could be contaminated.

If still no luck, you can check the water inlet valve with a test meter, but this requires familiarity with electrical apparatus. It's possible to power the water valve from a separate electrical source to test it, but only if you know how. This can be dangerous, so if you aren't comfortable doing this, it's best to call for repair. If the water valve checks out, then you may have a bad ice maker, especially if the unit is over 10 years old.