Bosch heat pumps pno.755078 / 651956 Home › Forums › Trade Technical & Spare Parts Forums › Trade Technical Enquiries › Bosch heat pumps pno.755078 / 651956 This topic has 2 replies, 2 voices, and was last updated 9 years, 10 months ago by timdowning. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts May 14, 2016 at 10:53 am #88308 timdowningParticipant Does anyone know if 755078 & 651956 are interchangeable? Quite a price difference but look the same… May 14, 2016 at 2:45 pm #437648 nomadPaulParticipant Re: Bosch heat pumps pno.755078 / 651956 They’re different sized bodies and the 755078 is a multi speed heat pump so as far as I am aware , they’re not interchangeable. May 14, 2016 at 2:58 pm #437649 timdowningParticipant Re: Bosch heat pumps pno.755078 / 651956 That’s a shame. £22 difference. Thanks for the answer. Author Posts Viewing 3 posts - 1 through 3 (of 3 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In