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New trane 3.5 heat pump having hard time with expansion

Customer Question
New trane 3.5 heat...

New trane 3.5 heat pump having hard time with expansion valve opening low pressure is 127 high is 226

Contractor's Assistant: Did you double-check the thermostat's settings? And what about the filters?

Everything ok

Contractor's Assistant: Do you plan on doing the work yourself?

Yes

Contractor's Assistant: Anything else we should know to help you best?

Our company switched to trane 5 yrs ago never ran into this problem attic is about 120 -140 during the middle of day

Submitted: 6 months ago.Category: HVAC
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Answered in 1 hour by:
8/3/2017
HVAC Technician: airheatman, HVAC Technician replied 6 months ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8,915
Experience: Furnace, A/C and heat pump specialist.
Verified

If this is an R410 system both pressures are low.May need refrigerant

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Customer reply replied 6 months ago
What do you recommend or could the system be flooded line length is 38 ft with a 12 ft lift 3/4 by 3/8
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

Have you weighed in refrigerant or do you have a reclaim machine to pull charge and weigh?

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Customer reply replied 6 months ago
I arrived to this mess today you recommend reclaim then install the 8lbs 3 oz charge
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

I would start by making sure charge is right before anything else.Not sure what label says charge is but add .6 oz for each foot over 15

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Customer reply replied 6 months ago
Thanks I never had one that wouldn't open never to old to learn something new
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

Let me know what happens and you determine

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