How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Phil Your Own Question
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 8769
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
Type Your HVAC Question Here...
Phil is online now
A new question is answered every 9 seconds

I have a gibson C5BA-T42C- evaporator coil. Had a new

Customer Question

I have a gibson C5BA-T42C- B evaporator coil. Had a new condenser put in. they didn't change the coil. Said it would be ok. They used r410a freon. Case on this coil say r22. Is this coil going to work or will i have trouble down the road.
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: About a month
JA: Do you plan on doing the work yourself?
Customer: no
JA: Anything else we should know to help you best?
Customer: no, just want to know if this is ok.
Submitted: 3 months ago.
Category: HVAC
Expert:  Phil replied 3 months ago.

Hello, the R22 coil is rated for 150 lbs pressure, the R410a runs 100 lbs higher pressure at times... the main issue though is the POE oil in the new system scours out dirt and debris from the old R22 tubing and can easily precipitate leaks. 50% chance you will have a leak.


I am a retired mechanical engineer and HVAC/ electrical/refrigeration and boiler contractor ... with 56 years in this business. The last 20 of those years consulting for major firms nationally.


All I ask is please select the ***RATING LINK***at the top of your page, that is the only way I am credited through the site.

Rating does not affect your charges nor ability to refund if not satisfied.