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Gaztech, HVAC Technician
Category: HVAC
Satisfied Customers: 475
Experience:  Owner at Gaztech
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I have a dual zone Klimaire KSIM20912-H216. I am licensed

Customer Question

I have a dual zone Klimaire KSIM20912-H216. I am licensed HVAC and installed this system. It cools some in Cool mode. Set to 62f, duct temp is 60f-65f on hi fan. In heat mode it does very little heating & will not go above low fan even when high is manually chosen. Does it just need evac and recharge? Is the correct amount of R410A 51 oz for this model?
Submitted: 1 year ago.
Category: HVAC
Expert:  Gaztech replied 1 year ago.

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It sure sounds like you may have gotten a unit with wrong charge or leaking unit. It would explain why the fan stays on low because heat is not satisfying the coil sensor.

Unit specify 51 oz. I would evac, micron test for leak, and recharge as you said, if in doubt inject a sealer. that should do it! Good luck..