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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 8512
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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My air conditioner freon 401 system, refrigerant seems full,

Customer Question

my bryant air conditioner freon 401 system, refrigerant seems full, but high side pressure reaches only 310PSI neither blow out air temperature is not hot. is that a compressor problem ( not making enough compression) or possible other problem?
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: yes, everything else( thermostat, filter) is set OK and changed
JA: Do you plan on doing the work yourself?
Customer: up to I understand whats tje problem exactly
JA: Anything else we should know to help you best?
Customer: just assume this unit is possibly working in two stage?
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the HVAC Technician about your situation and then connect you two.
Submitted: 1 year ago.
Category: HVAC
Expert:  Phil replied 1 year ago.

Hello, clarify please if it is refrigerant R-410a or if it is actually R-401.. there is a huge difference between the two... R 410a is pervasively the most common for air conditioning applications.

Tell me the exact outside temperature when you are reading 310 psig high side.

and... if the suction line attached to the compressor is cool, cold or frosty at that time.

We can go from there.

Customer: replied 1 year ago.
it was 410a, outside temperature was 82F, suction line was cool
Expert:  Phil replied 1 year ago.

Thanks. the system is slightly low on refrigerant, depending on its SEER rating the head pressure should be 316 for an 18 seer system, and 336 for a 15 or 16 seer system... and 5 tp 15 psig higher for a 13 or 14 seer system.

It is also possible that cooling coil is ice over, and blocking air flow to the vents, tell me if that seems to be the case or not, we can go from there.

Customer: replied 1 year ago.
i have to double check ice cover and filter and get back to you later ( other day?) thank you
Expert:  Phil replied 1 year ago.

OK, that will work.

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