Rob was a throughly polite, professional, experienced young man who fixed my heat pump quickly and efficiently despite a complex, difficult problem. The presenting problem was simply a small, blown fuse which kept my heat from working (for 4 days). Rob checked every single wire individually at each stage and finally located THREE wires which were shorting out the system. So, in summary: Responsiveness in an emergency A+, Competent A+, Knowledge A+, Polite A+ . I will be using Sandpiper from now on and will shout their praise to anyone with a HVAC problem. Thank you!