Quote:
Originally Posted by gchemist
It is possible to run a system without a high pressure switch. Only in a cool climate. Any warm and hot climate will build too much pressure. Sure the compressor valve will relieve pressure at a cost. The system will lose freon. Install the switch for operation.
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I've never run a high pressure switch and they didn't come that way from the factory either. I've never had a problem or seen a problem due to the lack of a high pressure switch. If your system pressure's truly get high enough to where the system vents you have bigger fish to fry. Typically inadequate airflow at the condenser or blockage.
I'm not saying there's no point to having additional failsafe's but really just make sure the system is properly charged, no blockage at the condenser with adequate air flow and you'll be just fine/
"Any warm and hot climate will build too much pressure" Don't you run the AC in warm/hot climate?