Whirlpool Dishwasher Sanitize Light Blinking Because the Water Was Not Hot Enough
A blinking Sanitize light, shown as the Sani LED, appears on Whirlpool built-in dishwashers such as the WDT730PAHZ and on portable models. It signals that the sanitizing temperature was not reached, so the dishes were not…
- Code
- SaniLight
- Appliance
- Dishwasher
- Brand
- Whirlpool
- Warranty
- 30-day workmanship
What SaniLight means
A blinking Sanitize light, shown as the Sani LED, appears on Whirlpool built-in dishwashers such as the WDT730PAHZ and on portable models. It signals that the sanitizing temperature was not reached, so the dishes were not sanitized. It is a temperature warning and not a breakdown. Start with your household water: run the hot tap about 30 seconds at the nearest faucet, and the water should reach at least 120 degrees F (49 degrees C). If it does, the heating inside the dishwasher is next.
Common causes of SaniLight
- Home hot water below 120 degrees F (49 degrees C) when the cycle starts
- Hot water not reaching the dishwasher quickly from the water heater
- Heating inside the dishwasher falling short of sanitizing temperature
- Temperature sensing reading incorrectly
1. Run the hot water at the faucet nearest the dishwasher for about 30 seconds, then check that it is hot. 2. Start the sanitize cycle again so the first fill is hot. 3. Cycle the power: on a built-in unit, disconnect it for one minute; on a portable, unplug it for 30 seconds. If hard-wired, use the breaker for the same time. 4. If the light still blinks, call us.
- Hot tap temperature at the sink does not always match what reaches the dishwasher
- A heater or sensor that is slightly weak shows up only as a failed sanitize result
- We measure the wash temperature, then give a written price before any repair
Other Dishwasher codes
Does the blinking Sani light mean my dishes are unsafe?
It means they were not sanitized, since the required water temperature was not met. That is a hygiene miss, not a safety hazard. Rewash them on a hot cycle once the water runs hot enough.
What temperature does the dishwasher need?
The water at the faucet should reach at least 120 degrees F (49 degrees C), as stated in the owner's manual. Run the hot tap for about 30 seconds before you check it.
My water is hot but the light still flashes. What next?
Then the dishwasher's own heating or its temperature sensing may be falling short of the sanitizing level. We test both on a visit and give you a written price before replacing anything.
Still unsure about SaniLight?
A technician diagnoses it on site and gives you the price in writing before any work starts.