What is the reason for being unable to add windshield washer fluid?
3 Answers
Internal blockage is present, it is recommended that the owner clean it promptly. Additional information: Precautions for automotive windshield washer fluid: 1. Understand the climate and choose the appropriate windshield washer fluid to prevent freezing: Before adding windshield washer fluid, it is necessary to have an understanding of the local climate, mainly the temperature. If the temperature is below zero, choose windshield washer fluid with a low freezing point, meaning to ensure that the windshield washer fluid does not freeze in the car after being added. 2. Water should not be used as a substitute for windshield washer fluid in cars: Mainly because water will freeze at 0 degrees in winter, and tap water contains many impurities. Moreover, it cannot serve the purpose of corrosion prevention for components, easily accelerating the aging of parts.
When I was helping out at the auto repair shop, I came across this issue. There are various reasons why windshield washer fluid can't be added. The most common one is that the filler neck gets clogged with leaves, small stones, or insect debris—the opening is small, and accumulated debris can block the flow. Another common scenario is when the washer fluid freezes in the pipes during cold weather, making the pipes too rigid to add fluid, especially in sub-zero regions. The pipes themselves might also be deformed or kinked, such as from collision damage or aging due to prolonged parking. If the reservoir is full but the fluid level sensor is inaccurate, you might think it's empty and pour in more, only to waste the fluid as it spills out. For prevention, I regularly clean debris from the filler neck, use antifreeze washer fluid in winter, and pour slowly and gently. If left unresolved, this issue can damage the pump or spray nozzles, leading to costlier repairs. For simple troubleshooting, start by clearing the filler neck; if that doesn't work, check the pipes next.
Last time I tried to fill up the windshield washer fluid, it just wouldn't go in, which was quite frustrating. I discovered that the inlet was completely blocked by a small insect and some fallen leaves. I managed to fix it by carefully picking them out with a thin stick. Frozen pipes in winter are also common—either wait for warmer weather to thaw it naturally or park in the garage for a while. I've also encountered a small crack in the reservoir that caused a leak, and the only solution was to replace it. So, I recommend wiping the inlet clean during each car wash to avoid dirt buildup. Additionally, avoid parking in windy spots to reduce the risk of freezing. Developing a habit of regularly checking the fluid level can save you a lot of trouble.
