Question about Carrier Heating & Cooling

Carrier Model No 42NVQ007MM inv, NO Heat output

Purchased approx 9 months ago has the above single box outside and two indoor units.Question,is this unit capable of providing a heat output with the outside temp of approx 17degrees C with a required indoor temp of say 21degrees.The installer seems to think that the problem may be that the indoor and outdoor unit 'aren't communicating' and seems baffled by the problem.There were slight problems initially with the system having to be 're-gassed' and a small leak from one of the indoor units rectified .

carol_whelto Feb 02, 2009

hi there,thanks very much for your prompt reply,as you surmised the guy involved was an installer not a 'tech' so would you be so kind as to explain the term 'locked out on low temp', again I look forward to hearing from you.jim

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146 Answers

Unit should be locked out on low temp and your electric heat should be running. is your installer a service tech or just an installer that could also be the problem if he is a service tech it would work correct when he left

Posted on Jan 31, 2009

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Carrier Model No 42NVQ007MM inv, NO Heat output

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