My dishwasher wasn't working well, so I bought a brand new one about 4 months ago. The new dishwasher is not working either. So I figured it had to be the water pressure. I called a local plumber and he stated that our hot water heater was old and had a lot of sediment in it and that was the cause of low water pressure making our dishwashers not work. I was quoted 1650.00 to replace the hot water heater. Is this price too high?