Frigidaire Dishwasher: Resolving White Film on Glasses -... | appliancefaults.com

Technical Background:

The dishwasher's Main Control Unit (MCU) controls the water inlet valve, heating element, detergent dispenser, rinse aid dispenser, and spray arm motor. The MCU receives input from sensors such as the water temperature sensor and turbidity sensor. Proper voltage (120V AC) is needed at the heating element for adequate water heating. A faulty dispenser solenoid won't open the dispenser.

Symptoms:

The homeowner observes a persistent white film on glasses and dishes after running the Frigidaire dishwasher, even when using rinse aid. The film is noticeable and detracts from the cleanliness of the items.

Possible Causes:

Hard water mineral deposits.
Improper detergent usage (too much or wrong type).
Low water temperature during the wash and rinse cycles.
Malfunctioning rinse aid dispenser failing to release rinse aid.
Clogged spray arms reducing water pressure and cleaning effectiveness.
Failing heating element.

Solution:

1

Begin by testing the water hardness using a water hardness test kit (available at most hardware stores). Note the grains per gallon (GPG) to determine the severity of the hard water.
2

Verify the dishwasher's water inlet temperature. It should be at least 120°F. Use a thermometer at the faucet before starting the dishwasher cycle.
3

Check the rinse aid dispenser. Ensure it is filled and properly adjusted. Try increasing the setting slightly to dispense more rinse aid. Observe the dispenser during a cycle. Does it seem to be functioning?
4

Inspect the spray arms for clogs or debris. Remove and clean them thoroughly under running water. Use a small wire or toothpick to clear any obstructions in the spray nozzles. Check the spray arm's rotation is not impeded.
5

Examine the detergent dispenser. Make sure it opens correctly and dispenses the detergent during the wash cycle. Inspect the solenoid. Check for 120V AC at the solenoid when the dispenser is supposed to release.
6

Run an empty dishwasher cycle with a dishwasher cleaner to remove mineral buildup and residue from the dishwasher's interior.
7

Inspect the float switch and check valve for mineral deposits. Use a multimeter to check continuity when the float is raised.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. Lock Out, Tag Out (LOTO) procedures should be followed. Capacitors can hold a charge, so discharge them before working on the control board. Use insulated tools when working near electrical components. 120V AC can be lethal.

Prevention:

Use a dishwasher salt (if applicable to your model). Regularly clean the dishwasher's filter and spray arms. Use the correct amount and type of detergent for your water hardness. Use a water softener if the water hardness is high.

Expert Tip:

Most Frigidaire dishwashers have a service mode. To enter service mode, simultaneously press and hold the 'High Temp Wash' and 'Heated Dry' buttons for 3 seconds. This will initiate a diagnostic cycle that can identify error codes and test individual components.

Frequently Asked Questions

•What type of detergent is recommended for my water hardness level?

For hard water, use a detergent specifically formulated for hard water conditions. Powder detergents are often more effective than gels or tablets in hard water. Consider using a detergent booster.

•How do I adjust the water softener setting on my dishwasher?

Refer to your dishwasher's owner's manual for instructions on adjusting the water softener setting. Typically, it involves accessing a menu through the control panel and selecting the appropriate water hardness level based on your water test results.

•How do I test the heating element in my dishwasher?

Disconnect power to the dishwasher. Locate the heating element and disconnect the wires. Use a multimeter set to ohms to measure the resistance of the heating element. A typical heating element will have a resistance between 15 and 30 ohms. If the reading is significantly higher or shows infinite resistance, the heating element is likely faulty.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What type of detergent is recommended for my water hardness level?

•How do I adjust the water softener setting on my dishwasher?

•How do I test the heating element in my dishwasher?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: