Freon leaking in chassis AC
I am having to recharge my chassis AC every year. My class A MH has been checked for leaks using the dye/black light method and the "sniffing method". No leaks were found. WE live in a cold winter c...
Forum Discussion
All refrigerants have a very defined pressure to temperature ratio as long as there is liquid in the system. At a given temperature (when not operating) there is a given saturation pressure. In the summer with the warmer temperatures the pressure will be higher. In the winter with lower temperatures, the pressure is lower.
A leak is nothing more than an orifice and at a higher pressure behind the refrigerant, the leak rate is higher. Lower pressure, the leak rate is lower.
Now back to finding the leak, the tech that told you about a "little valve that seals", you need to find a better refrigeration technician. There is not one thing on the system that is supposed to leak. The whole idea of a A/C system is to keep the refrigerant in the pipes and hoses.
If the tech uses the right equipment he can find a leak that is low as a couple of ounces a year. He probably does not have the equipment or does not know how to use it and look for a leak... again, time to find a new tech.
Refrigeration engineer and service since 1970 and I have found my share of leaks. Also see more than my share of poor technicians.
Ken
A leak is nothing more than an orifice and at a higher pressure behind the refrigerant, the leak rate is higher. Lower pressure, the leak rate is lower.
Now back to finding the leak, the tech that told you about a "little valve that seals", you need to find a better refrigeration technician. There is not one thing on the system that is supposed to leak. The whole idea of a A/C system is to keep the refrigerant in the pipes and hoses.
If the tech uses the right equipment he can find a leak that is low as a couple of ounces a year. He probably does not have the equipment or does not know how to use it and look for a leak... again, time to find a new tech.
Refrigeration engineer and service since 1970 and I have found my share of leaks. Also see more than my share of poor technicians.
Ken
