On Tuesday, December 6, 2016 at 4:44:04 PM UTC-5, Tom wrote:
I have a new furnace and a condensate pump the code requires the pump to be on
a gfci so they installed a combination switch receptacle the receptacle is
gfci the switch is not the pump is the only thing on the gfci they replaced
the pump and it still trips any thoughts?

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Almost guaranteed to be either the GFCI or its wiring. Make sure that Neutral as well as Hot is going to the GFCI.

But as Dev Null said (paraphrasing here), You paid someone to do this. Don't let them get away with sticking you with an installation that, while they say it meets code, doesn't work.