What is the reason for the high pressure of Nissan Tiida air conditioner not dropping?
3 Answers
Nissan Tiida air conditioner high pressure does not drop the reasons and solutions are as follows: Condenser fan failure: The main reason is the failure of the condenser fan. If the condenser fan is stuck or its rotation is hindered, it can cause the condenser fan to be overloaded. If the condenser fan does not rotate, the condenser will have nothing to dissipate heat, which will inevitably cause the condensation temperature to rise. Once the condensation temperature is high, the exhaust pressure will definitely be too high. Solution: It is necessary to check whether the cooling water flow and the cooling tower fan are normal, and the condenser needs to be cleaned. For air-cooled systems, check whether the external unit fan is normal, and the condenser needs to be cleaned.
I've been driving a Nissan Tiida for several years and have encountered the issue of high AC pressure not dropping a few times. The most common cause is the condenser being clogged with dust and leaves, leading to poor heat dissipation and pressure buildup. If the fan isn't spinning or is running too slowly, it can worsen the problem, possibly due to a faulty fan motor or burnt relay. Additionally, a stuck or malfunctioning expansion valve can restrict refrigerant flow, preventing pressure from dropping. Overcharging the refrigerant can also cause system overpressure. For a quick check, inspect if the radiator fins are dirty and if the fan is working; if not, consider replacing the expansion valve or adjusting the refrigerant charge. It's advisable to address this issue promptly to avoid reduced AC efficiency and potential compressor damage. Regularly rinsing the condenser during car washes can help prevent this issue.
When repairing cars, I often encounter Nissan Tiida models with persistently high AC system pressure, primarily caused by system blockages or fan malfunctions. Sludge and dust accumulation on the condenser impair heat dissipation, while non-operational fans pose greater issues—requiring fuse or circuit checks. Worn or stuck expansion valves are also common culprits, preventing proper refrigerant flow and sustaining high pressure. Impure refrigerant or air contamination leads to recurring problems. Start by cleaning heat dissipation components and testing fans; if pressure remains high, inspect/replace expansion valves or recharge refrigerant. Address issues promptly to avoid AC failure during high-load driving.
