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Discussion in 'Motorhome Chat' started by tick59, Jan 10, 2016.

  1. tick59

    tick59 Funster

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    At the new year we went down to Redcar with MCC. The van had been in for hab check the week before, when we arrived at Redcar the gas would not come through on cooker, fridge or fire. I found during hab test everthing was switched off, got the fridge going then the cooker, the fire lit but after about ten min whent out with a "BANG!!!!!!!"we left the fire for a while thinking air in the pipes, after about 30 min tried again and it lit, after another hour there was another loud "BANG!!!!!!!! we left the fire off. In the morning Knock at the door one of the members had been out with the dog and found the cowling off our van chimney. This had caused the "BANG!!!!!!!!!"Left it till we got home checked for damage and fire is working normally. SO WARNING CHECK THE COWLING ON YOUR VAN CHIMNEY AFTER HAB CHECK. fun!!! fun!!! fun!!! upload_2016-1-10_13-55-9.jpeg
     
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  2. Jaws

    Jaws Funster Life Member

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    LOL !
    We had exactly the same thing in Zahora ..
    Turned the fire on one morning as normal
    Woman wandered off to shower and I was getting breakfast started
    All of a sudden, BANG !!!
    Did the normal thing.. Ducked ( Gawd knows why but when ever I hear something go bang I duck ! )
    All went silent
    Several seconds later ( as I was relaxing ) another BANG but much quieter and on the roof !

    Turned out there had been a backfire, and the cowl had not only blown off but had gone a few hundred feet.. then came straight back down again !

    But like you, all was well and apart from shaking a whole load of crap off the inside of the fire ( thereby giving it a good clean ! ) there was no other issues at all
     
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  3. PeteH

    PeteH Funster

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    Trying to work out WHY, the cowl (or lack of it) would affect the combustion (or lack there-off)?

    So IF the loss of cowl had allowed the Flame to expire, the flame failure would shut the gas off. Demanding a (Manual?) re-ignition?.

    I suggest that the Gas flame control valve MAY be the issue? allowing some gas to pass the closed valve with glowing residue/ hot flue providing ignition and the ensuing explosion?. A serious service may be required.?

    BTW. A habitation check does not Automatically include a full service of Fridge and Heater, they are Usually Extras`.

    Pete
     
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  4. tick59

    tick59 Funster

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  5. John & Joan

    John & Joan Funster

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    If the gas/air mix is not right the fire will not light but gas can accumulate inside. I have had this happen many times over 20 years in Caravans with Carver SB1800 and Truma S3002 heaters. Another cause could be the burner is not working correctly. It has also happened when the fire would not light, but later the spark went and the gas inside exploded.

    I was parked a Tan Hill when the cowl was blown off another van when he was trying to light it with strong winds blowing outside. The cowl missed all the other vans and cars parked around.

    I have has the bang experience but so far the cowl has stayed in place. I have my fire serviced annually.
     
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  6. Jaws

    Jaws Funster Life Member

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    Canna speak for anyone else, but I did not have a loss of cowl until AFTER the bang and the thing was blown several hundred feet in the air !
    It was a nice calm day, nowt untoward or odd in any way
    I subsequently retreaved the cowl and refitted it without issue
     
  7. PeteH

    PeteH Funster

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    They Definitely serviced the Heater?. I do ask this, because many I speak to ASSUME it to be part of the habitation check. BUT at least two dealers who do "Hab" check / "Services" have told me they check it works. BUT a full heater and or fridge service is CHARGED and listed as Extra, and requires (some) dismantling of the unit, and in many cases the Fridge for example must be removed to service properly.?
     
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