Problem with my elliptical machine

We looked at a number of elliptical machines before buying ours. After much discussion with friends and lots of online research we ended up buying an X1 from BH Fitness. It's a quality unit and we bought it from a company called Fitness Showrooms that sells high end equipment. Our unit was reasonably priced and it seemed to be built better than the units they sell at Dick's Sporting Goods. Overall we are happy with the unit and the service (we had some small installation problems and a tech from Fitness Showrooms came by and addressed most of them). One problem that remains is that the heart rate monitor is completely inaccurate. I wonder if it was installed backward because my starting point is usually a HR of 170 and after a fairly intense session it drops below 100. The Fitness Showrooms tech told my wife that the HRM won't work if there is a computer in the same room or even on the same floor as the elliptical unit. I know enough about wireless networks to debate that. First, although it isn't listed in the manual I'm assuming that the the elliptical's control panel operates on a different frequency as my home network. Second, the HRM doesn't work even when when the computer is off. I'm going to ask the dealer to fix it or rebate me the value of the HRM so I can buy one like the Polar RS100 watch.