Alde Heating on Hymer , rear not getting warm

[HariSeldon]

New to Bymer having purchased a new Hymer BMC T 680 with Alde heating earlier in the year.

I have posed the question to the dealer but to date have not had a useful answer.
The Alde heating system works well, except that the hot water pipes that flow alongside the twin beds and the hot water pipes under the garage floor do not get hot.

The valves are open to both but the feed pipe is cold to the touch, whilst generally running the heating in electric I have also fired up the gas to ensure that the boiler has sufficient output but this has made difference.

The front half of the van is very cosy but the only heat to the rear comes from the little radiator assembly under the rear steps to the bed, a hot water pipe goes from this towards the rear of the garage, it’s warm but not hot to the touch.

Appreciate any ideas...

The taps that are open in the hot water pipes are one under the floor under the table, one on the pipes on the near side bed and one in the garage wall. There is a bypass line regulator on the pipe on the other bed, looks like a brass nut tee’d off the pipe, this is screwed down but the pipe is cold either side, ( the manual suggests opening this a little if the bed valve is closed, it’s open)

 

[Wanderlust]

Have you tried bleeding the system ? Bleed valves should be at high points around the van, turn pump on get it up to temp, turn off circulation pump then bleed air from said valves. Only know this as I have been to Alde today to get ours serviced, so from the horse's mouth so to speak.

 

[Googlebot]

Sounds like it needs bleeding. The pump also has a speed setting on it, check that it is on setting 2 for motorhomes.

 

[Wanderlust]

For bleeding Alde service engineer said 5 on the pump setting 2 to 3 for normal ops.

 

[Googlebot]

For bleeding Alde service engineer said 5 on the pump setting 2 to 3 for normal ops.

Don’t have the pump running while bleeding though. Apparently that sucks air in.

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[HariSeldon]

Thanks for the replies I’ll take a look at doing this tomorrow.

 

[Googlebot]

Another tip is to take it to a steep hill, point up and bleed, turn around and point downhill and bleed. Used to do this with the caravan and it worked every time.

 

[mitzimad]

can you shut off the sections that are working as it could be airlocked

 

[HariSeldon]

I had a word with the dealer and they suspect van air lock. They now have some parts that are required for some warranty work and so will look at both issues for me in the new year.

Many thanks for the helpful suggestions.

 

[GKD]

Did this ever get resolved and how was it done

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[HariSeldon]

Yes it did, the dealer replaced a valve in the system, then another , then another and finally the remaining one … it did then all work including the garage underfloor heating. It’s interesting that the heating has to be in for some time before the rear emitters alongside the bed get hot, but when they are hot, they are hot.

 

[Basildog]

Yes it did, the dealer replaced a valve in the system, then another , then another and finally the remaining one … it did then all work including the garage underfloor heating. It’s interesting that the heating has to be in for some time before the rear emitters alongside the bed get hot, but when they are hot, they are hot.

Don’t mess around with the dealers when you have any problems with Alde heating system, ours was supplied from new with several issues which the dealers failed to diagnose or fix , just lots of implausible excuses, booked into Alde headquarters at Wellingborough, great service, guys know the products well and we left with all faults fixed , fluid changed as Hymer put the cheap green stuff in , I wouldn’t go anywhere else with an Alde system .

 

[TinaLes]

I am glad those "bleedin Engineers" sorted it out for you, I did learn a few tricks on how to drain & refill the system without special tools, and to not get an air block in the system, but that's when the vans came with 2 year anti-freeze, it was replaced with the 5 year longer life one, which should be fitted in the first place on all new vans.
PS: Its not a Swift/Bessacar by any chance is it?
LES

 

[Paul Henshaw]

I would just like to reiterate that if anybody gets a problem with Alde system ring up GB HQ.
they are a group of Brits with Swedish ATD and customer service

 

[GKD]

Thanks. I’ve suspected a faulty valve for some time.

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