Coachman Posted January 9, 2010 Share Posted January 9, 2010 The noise from the front of our fire drives me up the wall.I thought i had cured it by sliding a piece of tubing over those two wire brakets which hold the fire in place.It did for a while then the grating camee back. One trouble also doing this is the front does not come easy because of the plastic tubing on the wires Why do they make such a design when a couple of suitable plastic shaped hooks would cure it. Link to comment Share on other sites More sharing options...
breakaleg Posted January 9, 2010 Share Posted January 9, 2010 Hi Coachman, Had the same problem with mine (drove me nuts) anyway, took it into auto sleeper for habitation service, and they put two black screws into the frame at the top of the fire (where it is beveled at the top) on the sides about four inches from the top worked a treat, only hear it now on the roughest of roads. downside is,if you want to remove the front panel, you have to take the screws out but no big deal. Pete Link to comment Share on other sites More sharing options...
Derek Uzzell Posted January 10, 2010 Share Posted January 10, 2010 Coachman - 2010-01-09 1:13 PM Why do they make such a design when a couple of suitable plastic shaped hooks would cure it. The likely reason is that Truma 'fires' were originally intended for caravan heating, where en route noise won't be a nuisance. I've heard Truma technicians blame poor installation as a common cause of the noise in motorhomes, but the problem is well known and plainly design-related. The standard ploy is to do as breakaleg advises and add a couple of inconspicuous screws. Link to comment Share on other sites More sharing options...
SBS Posted January 10, 2010 Share Posted January 10, 2010 Have you tried putting some tubing over the two bottom hooks? Electrical heat shrink tubing might be a good solution. We had a problem with the heater rattling in use, when on auto at certain fan speeds - I have now cured this and it is very quiet. Mike Link to comment Share on other sites More sharing options...
Brambles Posted January 10, 2010 Share Posted January 10, 2010 You may find it is actually the cast alloy heat exchanger itself which is rubbing on the horizonal fins of the cover. Link to comment Share on other sites More sharing options...
Coachman Posted January 11, 2010 Author Share Posted January 11, 2010 I di check for anyother part touching and it is the wire springs which cause the probleem , however i will not discount the one about the bottom hooks.Thanks for comments. Link to comment Share on other sites More sharing options...
arc systems Posted January 17, 2010 Share Posted January 17, 2010 I tend to agree with Truma?! that it is the installation to blame and not the design. The heads of the screws used to hold the rear surround to the cabinetry are often panheads and therefore over sized, these hold the front cover 'off' and don't allow the clips to hold the front cover tight. The clips themselves I've found are often bend out of shape/position, this especially together with large screw heads leaves the front loose to rattle. As said the fire itself is sometimes fitted too far forward and one or more of the louvres catches, you won't necessarily see evidence of it though? A quick check of this is to loosen the front screws and use a couple of thick washers to tilt the fire back, if that works, you will have to realign the fire. The above problem will often be evident as you walk by the fire, you don't mention if the problem is both static as well as on the move? if though only on the move, another possibility is wheel balance? don't take it for granted rear wheels have been balanced, make sure they have been? Link to comment Share on other sites More sharing options...
Coachman Posted January 18, 2010 Author Share Posted January 18, 2010 The noise comes as soon as engine is started but nowhere near as noisey when going along. Link to comment Share on other sites More sharing options...
arc systems Posted January 21, 2010 Share Posted January 21, 2010 Which I think reinforces installation being the problem rather than Truma's, the fire is resonating in tune with the motorhome vibrating. I always look at it this way, if it was Truma's fault, then all would have the problem, clearly that is not the case? Engine vibration at tick over is different to when revved, this then should alter the vibration noise coming from the fire, there should be a point where the fire is silent? Vibration from out of balance wheels will also vary while on the move with the same change in sound/pitch from the fire. One or both sources of vibration will have an overall effect on the fire, ie things working loose which will make the noise worse and more constant. Mike above mentioned his fan housing making a lot of noise, this is held by three screws to the thin alloy heat shield at the back of the fire, this in itself acts an amplifier of any vibration noise. Make sure then these screws and any others holding the back to the woodwork are tight. Any signs of looseness, or worse, fatigue cracks in any metal work is a sure sign of outside sources of vibration being at fault, not the fire. Check the fire base plate where the four bolts attach the heat exchanger, cracks around these holes is common on caravans where serious out of balance wheels are fitted Link to comment Share on other sites More sharing options...
Coachman Posted January 21, 2010 Author Share Posted January 21, 2010 The only really loose item i have found is behind the fire, its a tin box at the bottom which i tried stuffing insulation material under it but its still wobbles a bit. I think its just clipped on as i see no screws etc.Wheels are all balanced, fins not touching. Anyway thanks for comments Link to comment Share on other sites More sharing options...
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