Inconsistent AC Performance (Cold on Passenger Side, Warm on Driver Side)

QuestionsCategory: Ask An ExpertInconsistent AC Performance (Cold on Passenger Side, Warm on Driver Side)
Ava Karen Brown asked 5 months ago
I own a 2005 Honda Accord and am experiencing an issue with the air conditioning. When I set the AC to maximum, the passenger side blows cold air, but the driver side only emits warm air. I came across a suggestion about using a refrigerant reset, possibly with AC PRO R134A. Could this be a Freon issue, or is it more likely related to the vehicle's internal mechanisms like the blend door or evaporator?
1 Answers
Zack Norman Staff answered 5 months ago
Hi there, Ava! AC problems are always odd and confusing to diagnose and troubleshoot. However, based on your explainer there, I think I've nailed down what might be the problem here. Here are some insights and potential solutions that you could consider:
  1. Freon Levels: A common cause for such AC behavior is low Freon levels. If the Freon is insufficient, it may not cool the entire evaporator core, leading to cold air on one side and warm air on the other. It's essential to ensure the correct Freon amount, as overcharging can also lead to issues.
  2. Use of Refrigerant Kits: While using kits like AC PRO R134A can be a DIY solution, they often lack precision. For systems requiring a specific amount of refrigerant, professional servicing is recommended to avoid overcharging.
  3. Blend Door Malfunction: The blend door controls air temperature by mixing hot and cold air. If this mechanism is faulty, it can result in uneven cooling. This is particularly likely if your car doesn't have dual climate control.
  4. Evaporator Issues: The refrigerant enters the evaporator, and if it's low, only part of the evaporator might be functioning correctly, causing the uneven cooling.
Considering these points, we recommend starting with a professional AC system diagnostic. They can check Freon levels accurately and inspect the blend door and evaporator. It's often more cost-effective and reliable than attempting a DIY fix with a refrigerant kit. If you have any further questions or need assistance, feel free to reach out! Zack - Motor Verso Mechanics Team