Model #SS-CT72 SONY speakers

 Thank you for your question and I understand your concern.

The fuel pump is a diaphragm type system which consists of several components which operates off of crankcase pressure. You can view the carburetor parts group with part numbers at Searspartsdirect.com.  There is a repair kit # 142-0557 and there is also a valve plate repair kit # 142-0667. Both kits are expensive but I believe I would order the repair kit # 142-0557 rather than the valve plate repair kit. 

 I hope this is helpful. If I may be of further assistance as more details become available, please reply to this post. 

First, make sure that the ice maker switch is in the "ON" position. This basic troubleshooting step should not be overlooked even though it is simple.

Make sure that the water dispenser works. If the pressure and flow through the water dispenser is weak, you may have a water supply problem. Change the water filter and see if pressure and flow improves through the water dispenser. If it does then there is a chance that the ice maker will begin producing ice.

If replacing the filter does not help, then you will need to check the water supply provided to the refrigerator. Shut off the water supply valve for the refrigerator and remove the water line that is attached at the back of the unit. Place the end of the water supply line in a bucket and briefly open the water supply shut-off valve to check for proper water pressure and flow from the end of the supply line. If the water supply is inadequate, then you will need to have a plumber fix this issue.

If the water supply is okay, then I recommend that you manually fill the ice maker with water using a turkey baster or squirt bottle. See if the ice maker cycles and dumps the ice out once it is frozen. If it dumps the ice but does not refill, then you could have a bad ice maker or a bad fill valve. The image below shows the technical troubleshooting for this type of problem. If the ice maker did cycle and dump the ice, you do not need to check the voltage on the brown wire going to the ice maker. Live voltage checks are dangerous and should normally be conducted only by a technician using a volt/ohm meter. You can unplug the refrigerator and check the resistance of the fill valve through the white and orange wire in the harness that plugs into the ice maker. If you measure the proper resistance through this circuit (180 ohms), then the ice maker will need to be replaced. If you do not measure the 180 ohms of resistance, then I recommend that you check the resistance directly at the water valve solenoid (with the refrigerator still unplugged ). If the valve is bad then it will need to be replaced. The part number for the valve assembly is WR57X10032. You can order this part from the Sears PartsDirect website.

If the valve is okay, then you have a wiring failure between the ice maker and the water valve if the resistance through the circuit is bad. A service technician will normally need to repair this type of failure. Here is a link for the Sears Service website: Sears Home Services .

If the resistance through the water valve circuit is okay, then the ice maker assembly (part WR30X10093) will need to be replaced.

If the ice maker assembly did not cycle when manually filled with water, then the voltage will need to be checked going to the ice maker as described in the image below. I do not recommend that you attempt this live voltage check unless you are completely confident in your technical ability to safely complete it using a volt/ohm meter. If the ice maker is getting voltage, then the assembly will need to be replaced. If it is not getting voltage then you have a wiring failure in the circuit that will need to be repaired by a service technician.

These tips should help you determine the cause of your ice maker failure.

If you need more assistance, reply with additional details.

According the the technical information on this refrigerator, this control does not have a diagnostics mode.