Auto Air Conditioning & Heater Repair/auto ac

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Expert: - 2/5/2011


Question
charged ac on 95 toyota truck suction was good but the high side was getting cold instead of the low.what might the problem be

Answer
If you mean the high before and around the condenser then a blockage is likely, possibly around the drier caused by loose desiccant, or in the condenser itself.
Your vehicle is of an age when the compressor could break down, or if has been replaced previously without flushing the entire system.This will push debris toward the condenser.
The reason your low side is warm is there is no flow past the frozen point.
In other words the compressor is trying very hard to get what is needs but the low side side will be in a vacuum in spite of what your gauges are telling you. This is bad news for the compressor and the problem needs sorting.
Find the coldest point, the blockage is likely to be just ahead of it. Discharge the system to waste using an approved recovery machine, letting it go is illegal and won't release the trapped gas so when you open the closest union it will spray everywhere.

Decide what the problem is . detach the faulty component and try to clear it using an airline in a wide open space. You may like to take the precaution of wearing protective eyewear, as debris shoots out like a bullet.

Grey mulch or shards of metal are bits of compressor. If it is the compressor then the same is likely to happen again.
If you need help with the proper procedure for compressor replacement, mail back

Hope this helps

Auto Air Conditioning & Heater Repair

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Paul Evans/ www.chillywillys.org

Expertise

Any question related to the function or malfunction of vehicle air conditioning excluding model specific problems with the heater controls. We are a UK based company and are unlikely to be familiar with the exact make and model of American vehicles. We will always at least try to guide the owner towards what the problem is likely to be in this instance We may struggle with none specific electrical issues related to the a/c without seeing it but it is likely we could narrow the problem down

Experience

Director www.chillywillys.org specialising predominantly in UK vehicles, fleet, rare and collectables. Although all a/c works on the same principal US vehicles have different controls and electrics. 12 years experience automotive and aircraft air conditioning. This is our sole source of revenue, we see lots of a/c issues that we are able to diagnose accurately mainly down to experience. UK have garages caught on to a potential revenue stream within the last few years but sometimes struggle with the problems as they don't see the issues that often........to be fair they could get their own back and ask me to change a timing belt ! Certain vehicles have known issues, we can help with that and also anything that is obvious to us but not necessarily to the bamboozled owner....... a/c is relatively new here and owners are catching on to maintenance but are sometimes still misguided by inexperienced individuals a bit timid to say' I don't really know

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