I have a 2.5 nordyne heat pump at 40 deg I read 58 psi on the suction and 165 psi on the disc with a liquid temp of 90 deg register temp 88 deg.charging chart calls for 51 psi suc 164 psi disc and a liquid temp of 160 deg. 2 yr old 13 seer first season for heating.
Ac mode all is fine. Any help? Thanks

Air filter clean?

Is this in a house or mobile home?
Mobile home duct is restricted and can cause that type of lower reading.
Actually you are very close it might be best not to fool with it OR recover all the refrigerant and Vac down. Use a graduated cylinder or a scale and weigh in the correct amount to be perfect. Then leave it alone.

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Originally Posted by grandslam

i have a 2.5 nordyne heat pump at 40 deg i read 58 psi on the suction and 165 psi on the disc with a liquid temp of 90 deg register temp 88 deg.charging chart calls for 51 psi suc 164 psi disc and a liquid temp of 160 deg. 2 yr old 13 seer first season for heating.
ac mode all is fine. any help? thanks

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Check your filter. High suction line temps are usually caused by air restriction across the coil. Try taking the filter out for a couple of minutes and see what happens. You will be amazed. After you dorp temp you may drop pressure a bit on at least the high side. Good luck