HVAC

Ask a HVAC Question, Get an Answer ASAP!

Have your own HVAC question?

5 HVAC Technicians are Online Now

characters left:

Not a HVAC Question?

Question

My inside coil is freezing up. I had a local service tech, check it out and he said " 65/193 temperature split 18 degrees 78 degree return. Unit charge is right on withcharging chart."

After he left, the inside coil froze up in a few hours?

Submitted: 159 days and 1 hours ago.

Category: HVAC

Value: $15

Status: AWAITING CUSTOMER ACTION

Answer

Hello,

The the unit can freeze given any of the following..

dirty filter
dirty evaporator coil
low blower/restriction
low on refrigerant
Bad thermal expansion valve

The reading we need to know is the superheat (or subcooling if txv)

I would look for numbers higher than what was written.

If the outdoor temp is equal to or higher than your indoor temp I est more around 70-75 on the suction pressure....which you are reading 65. Once you get to 60 and below you begin to freeze.

I think he needs another look at it...or another tech needs to look at it.

Depending on the superheat...sounds like it is low.

Billy

Accepts:
Expert:	Billy
Pos. Feedback:	99.7 %
Answered:	6/15/2009

HVAC Mechanic

State Licensed Mechanical Contractor, Heating, Cooling, Oil Burners, Heat Pumps, Boilers, Geothermal

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

HVAC

Have your own HVAC question?

Question

My inside coil is freezing up. I had a local service tech, check it out and he said " 65/193 temperature split 18 degrees 78 degree return. Unit charge is right on withcharging chart." After he left, the inside coil froze up in a few hours?

Answer

Related HVAC Questions

My inside coil is freezing up. I had a local service tech, check it out and he said " 65/193 temperature split 18 degrees 78 degree return. Unit charge is right on withcharging chart."

After he left, the inside coil froze up in a few hours?