"cshenk" wrote in message
...

While I am willing to know when I need a pro.


I doubt I will see a problem. I don't know what to look for.


I have a company coming out tomorrow to check mine. I probably do not
need a full HVAC reoplacement (combined heat and AC and heat worked while
AC is under cooling). All I know we skipped HVAC maintenance while paying
off 25,000$ in rental damage and some 5,000$ in materials to 'DIY'
repairs.

I am pretty sure we just need added coolant. We have not done that in 3
years since return as as far as we lnow, it was last done in 1998. The
renters were not bashful at all at getting contractors in the reducing
their rent by the cost and filing after the fact but there is no referent
to Freon added. Heck I was in Japan. I can just reasonably guess last fill
was 1998.

In my case, still have AC but it is not as cool as it should be. Last
year it was 'ok' but I recall it being better.

Professionals due in tomorrow to service the unit and do what is needed.


OK just so you know, house AC systems have a hermetically sealed refrigerant
circuit, that means the entire thing is all metal except for the Fusite
where the electrical terminals enter the compressor. As such the system
should NEVER require adding refrigerant EVER. If it needs any added then
there is a leak somewhere plain and simple. Car systems however can
sometimes require topping off every several years due to the refrigerant
permeating through the rubber hoses.

And the term is refrigerant not "Freon" or coolant. Freon is DuPont's trade
name for CFC and HCFC refrigerants manufactured by them This does include
R22. However DuPont's trade name for HFC refrigerants such as R134a is
Suva. Hence anyone you may hear referring to the refrigerant in their '94
or newer car as Freon is dead wrong. The same can be said for anyone with a
new AC system using R410a

Coolant stays the same phase (solid, liquid, gas) as it carries heat around,
refrigerant changes phases.