My 4 year old heat recovery pump magnet spinner broke - failure mode normal?

[mtbdudex]

Hi;
I have a heat recovery loop on my geothermal unit.
Original installed 2002, in Jan-2011 the motor itself went bad so I got replacement from Milton Roy.

2 weeks ago I noticed the loop was not circulating, well it was noticed because the hot water ran out quicker, and when I went into the utility room then I noticed it.

My unit


taken from it's box


the cracked magnet spinner


.

4 years seems short life for the unit, is this abnormal failure mode?
I've got inquiry to my sales contact at Milton Roy, just curious others experience.

[mtbdudex]

well; my response from Hartell did NOT make my day at all:

From: GP MR Hartell Support [mailto:hartellsupport@miltonroy.com]
Sent: Wednesday, March 11, 2015 4:10 PM
To: Rosinski, Mike
Subject: RE: need replace MD-17-1 for my 4 year old order placed with you (, order# xxxx)

Good afternoon,

I have forwarded your request to our engineering team to see if they have an explanation for why the magnet broke after 4 years of use. The manufacturer’s warranty on this model is 1 year.

Unfortunately these models were discontinued with no replacement in October of 2014 and we do not offer any replacements.

Thank you,
Hartell Support

MILTON ROY, LLC
Website: www.hartell.com

Not happy - this model is "***OBSOLETE. NO SUGGESTED REPLACEMENT***
MD-17-1"
http://www.patriot-supply.com/produc...Hartell_802319

So, I'm off trying to find a replacement pump now that can be plumbed into the box.