E1 on jet tech 737dp

Check the inlet screen to the water circulating pump and the water heater element for lime buildup. I've seen a heater element that had a 1/4" thick layer of lime encasing it. The inlet also had some lime and other debris clogging the screen. After carefully chipping away as much as was practical and running lime remover (such as CLR) through the machine, it heated the water much more quickly and had an effective spray.

To prevent a recurrence of this problem, make sure you have a functional water softener ahead of the water heater feeding the machine.

The F-22 wash tank heater is controlled by a thermostat that opens or close a relay located in the control panel on the right. the thermostat is located inside the machine next to the wash tank. the thermostat is fixed position and can not be adjusted. the temperature should be 170F max. The thermostat has a bulb attached by a wire. this wire is actually a tube and the bulb is filled with an oil that expends when heated. the bulb is inserted in a cavity in from of the wash tank. You can access this by removing the front panel. If the bulb is not in the cavity, it will produce alot of heat. if the "wire" is broken or just simply the thermostat has become defective than it should be replaced. Search by part number or description

Most Jet-Tech dishwashers has one adjustable rinse thermostat and one fixed wash thermostat. The wash thermostat can be substituted with an adjustable thermostat. Location depends on the model. F-18 are located on top. F-22 are located under next to the wash tank. Search by part number or description

Try going into the settings

Use a good quality powder detergent.
Check your incoming water temperature, 120 degrees plus.
Use a rinse aid such as Jet Dry.
Start the DW without soap and no dishes.
Once it starts the wash cycle pour in 1 quart of WHITE vinegar and let it finish the full wash cycle.
Then load up with dishes and powder detergent and run a load.

The blinking "clean light" is a common problem with some of the Kenmore and Whirlpool models dishwashers.
The problem is usually attributed to water supply temperatures being too low when filling.

Apparently, there are some issues with the temperature sensing circuits in some dishwashers that causes an error code to be generated if a certain water temperature is not achieved in a specified time interval (this time may differ between models).
There is a reset sequence that you can try to clear the fault.
Push the NORMAL WASH then HEATED DRY buttons in that sequence two to three times.
The unit will enter diagnostics mode, but can be stopped by pressing the CANCEL button.
This will clear any existing faults and should return the dishwasher to normal operation.

To keep the fault from returning, it is recommended that you run your hot water faucet in the kitchen until it runs hot BEFORE you start the dishwasher.
This will heat the water in the supply line for the dishwasher (most dishwashers are fed from the kitchen sink supply line).

The theory is that if you fill the dishwasher with hot water from the start of the wash cycle instead of the cool water that is normally in the lines (especially if you have a hot water tank located far away from the kitchen), this should satisfy the requirements of the temperature sensing circuits.
If the fault reappears, there should be a tech sheet located inside the lower panel under the door that explains what the fault is.
The flashing light will be a series of flashes, followed by a pause.
If you indeed have a component problem, it will depend on the number of flashing lights in the sequence.
Refer to the tech sheet to determine WHAT component is affected and how to troubleshoot.

Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.
^^^^^^

I lifted this off the tech sheet for your dishwasher, it explains your problem of long wash times.
Heater or temperature
sensor problem:
■ Open connection or
component in heater or
temperature sensor
circuit(s).
■ Open in heater or faulty
temperature sensor.
■ Faulty heater drive
circuit or temperature
sensor input on control

Check to see in you have enough water in tank. The dishwasher fills then recirculates this water under pressure. If you have water in tank, listen to see if motor is running or not. If it is, you may have clogged jet holes in the wash arms.

the heater in the unit is supposed to heat both the wash water and the rinse water.
if it is not, then you have a problem in a controller or an element.
how are you determining the temperature and are you waiting for the unit to signal ready before you test it?

mark evans

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