B1250HVAC
Air Conditioning Compressor Clutch Circuit
B1250 indicates a fault in the A/C compressor clutch control circuit. The system cannot engage the clutch properly, so cooling is affected.
🚗 Yes, this affects air conditioning, not safety.
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🎯 Top Causes, Ranked by Likelihood
#1Faulty A/C compressor clutch or coil$150-$600
The clutch coil fails and will not engage the compressor.
#2Wiring or relay fault$30-$200
A bad relay or broken wire prevents clutch engagement.
#3Low refrigerant lockout$100-$300
Low pressure prevents the system from commanding the clutch.
🩺 Common Symptoms
- A/C blows warm
- Compressor clutch not engaging
- Clicking A/C relay
- HVAC code stored
💰 Repair Cost: DIY vs Shop
📋 Free OBD2 Code Cheat Sheet
The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.
🔧 How to Diagnose B1250
1Check refrigerant pressure with gauges
2Test the A/C relay and clutch coil for power and continuity
3Inspect the clutch wiring and connector
4Replace the relay, clutch, or recharge as indicated
❓ Frequently Asked Questions
Why is my A/C warm with B1250?
The compressor clutch is not engaging, so the compressor cannot cool the refrigerant.
Can low refrigerant cause B1250?
Yes, a low-pressure lockout prevents the clutch from engaging.
What causes B1250?
A failed clutch coil, a bad relay or wiring, or low refrigerant.
🔗 Related Codes
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