Ncp151 aircond no cold, cooling coil leak , change vavle, fan motor and flushing aircond.
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When people say “cooling coil leak” on a Toyota NCP151 (Vios / Yaris XP150), they usually mean one of two things. Let’s pin it down 👇
1️⃣ A/C Cooling Coil (Evaporator) Leak — MOST COMMON
This is very common on NCP151 models.
Symptoms
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A/C not cooling or slowly getting weaker
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Need to top up gas frequently
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Bad smell from vents (musty / chemical)
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Oily residue from A/C drain (rare but telling)
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No visible leak in engine bay
Why it happens
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Evaporator coil corrodes over time
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Moisture + dust buildup inside dashboard
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Thin aluminum coil develops pinholes
Fix
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Dashboard must be removed
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Replace evaporator coil (recommended, not repair)
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Replace expansion valve + O-rings
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Vacuum + refill refrigerant
⚠️ This is labor-heavy but a permanent fix
2️⃣ Radiator / Engine Cooling Leak (Less Common)
This affects engine temperature, not A/C.
Symptoms
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Engine overheating
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Coolant level dropping
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Wet spots under car
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Sweet smell from engine bay
How to confirm which one it is
Quick checks:
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❄️ A/C weak but engine temp normal → Evaporator leak
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🌡️ Engine overheating → Cooling system leak
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