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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Baxi Solo 2 40/PF fan "oscillating"
Completely different problem than a recent post, and a problem that I've had
for quite a while now... Baxi Solo 2 40/PF Boiler. When the boiler is supposed to fire up, the boiler can go through a phase of firing up the fan, then cutting it off a second later. This results in a quiet "whoophm, whoopm, whoopm" noise (around 0.5Hz) for the few minutes before "something" takes hold, the fan spins normally and the boiler fires up properly (with a healthy "click" of some relay somewhere actuating) During all this, the proverbial "tap" on the side does cure this (boiler fires immediately). So.... what's this likely to involve?, is there some protection circuitry around the fan that might be goosed? As always, any help appreciated. Mike |
#2
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On Fri, 11 Feb 2005 17:35:45 +0000, Mike Dodd wrote:
Completely different problem than a recent post, and a problem that I've had for quite a while now... Baxi Solo 2 40/PF Boiler. When the boiler is supposed to fire up, the boiler can go through a phase of firing up the fan, then cutting it off a second later. This results in a quiet "whoophm, whoopm, whoopm" noise (around 0.5Hz) for the few minutes before "something" takes hold, the fan spins normally and the boiler fires up properly (with a healthy "click" of some relay somewhere actuating) During all this, the proverbial "tap" on the side does cure this (boiler fires immediately). So.... what's this likely to involve?, is there some protection circuitry around the fan that might be goosed? As always, any help appreciated. Sounds very much as you would expect if the PCB (probably but not always a relay on it) has a fault. The power is applied to the fan which starts when the APS switches over the relay is meant to do so as well and keep the power to the fan going. If the relay is stuck the power gets cut and the fan slows down until the APS switches back. -- Ed Sirett - Property maintainer and registered gas fitter. The FAQ for uk.diy is at http://www.diyfaq.org.uk Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html |
#3
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In message , Mike
Dodd writes Completely different problem than a recent post, and a problem that I've had for quite a while now... Baxi Solo 2 40/PF Boiler. When the boiler is supposed to fire up, the boiler can go through a phase of firing up the fan, then cutting it off a second later. This results in a quiet "whoophm, whoopm, whoopm" noise (around 0.5Hz) for the few minutes before "something" takes hold, the fan spins normally and the boiler fires up properly (with a healthy "click" of some relay somewhere actuating) It sounds like it could be bad contacts in the air pressure switch. It's also a failure mode of the PCB (normally a capacitor on the pcb in the process of dying) Quite what the "Whoomp, whoomp..." is, I'm not sure, but I get the same with my vaillant boiler when it's trying to ignite. Since I'm about to replace the boiler, and it only happens occasionally, and ... nobody seems to know exactly why, I haven't investigated further During all this, the proverbial "tap" on the side does cure this (boiler fires immediately). So.... what's this likely to involve?, is there some protection circuitry around the fan that might be goosed? As always, any help appreciated. Mike -- geoff |
#4
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In message .uk, Ed
Sirett writes On Fri, 11 Feb 2005 17:35:45 +0000, Mike Dodd wrote: ? As always, any help appreciated. Sounds very much as you would expect if the PCB (probably but not always a relay on it) has a fault. The power is applied to the fan which starts when the APS switches over the relay is meant to do so as well and keep the power to the fan going. If the relay is stuck the power gets cut and the fan slows down until the APS switches back. Ed - relays very seldom stick (only when a short causes the contacts to weld together. It's usually whats driving it not getting up to a sufficient voltage to energise it sufficiently. -- geoff |
#5
Posted to uk.d-i-y
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Baxi Solo 2 40/PF fan "oscillating"
replying to Mike Dodd, John wrote:
Hi I have a Baxi solo 2 40 pf burner will not come on only if you open the case it will then work fine until l turn the clock to off then it will not come on again the air flow switch has been changed many thanks -- for full context, visit https://www.homeownershub.com/uk-diy...ng-152234-.htm |
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