Any Henry vacuum cleaner geeks out there?

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Today Henry # 1 stopped working. It was running very hot and under load and
I assume some kind of thermal cut out "cut out". Went back 30 minutes
later and it worked fine.

When investigating I found that even on "no load" (ie the motor assembly
completely removed from bag and filter) the exhaust air was still
surprisingly warm.

So I made a comparison with our other very much newer Henry (lets call him
Henry # 2). On this one the exhaust is not so noticeably warm under the
same circumstances.

So I investigated further.

Henry # 1 (old) states 850W motor and draws 4.45 Amps at idle.

Henry # 2 (new) states 1000W motor and draws 3.95 Amps at idle.

Methinks there's something wrong with Henry # 1....which seems to be
converting about an Amp of supply current straight into heat!!!!

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Q1. Are these symptoms consistent with a simple-to-fix fault? (ie change
the motor or similar)

Q2. If so is the motor easy to change (I assume so as spares are readily
available).

.....or should I just go to Homebase and buy a new one (currently on offer at
£85) and keep the old for parts

Any opinions appreciated.

D