Have heatpump gas backup when aux heat comes on it doesn't drop out the heatpump. It stays running but I'm getting 24volts from tstat?

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Xx

http://customer.honeywell.com/techlit/pdf/69-0000s/69-1783.pdf

Make sure you check your installer settings. If it worked before it should be working now. If it is a new install you could have other problems

Set to 2 heat and 1 cool in settings