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Post by DIYDafty on May 4, 2024 19:33:10 GMT
Fan gone again in my British Gas RD1 3100 boiler. I've changed it a couple of years ago but thinking this time to try and replace the bearings but is it obvious what to do or any links saying how to do it? Otherwise will need to buy another "refurbished" off ebay . Edit: I think I found a video How to tell if its working before I fit it and how does the circuit board decide if its working or not ? Edit2: Found my old thread when this happened last time. Thanks again to Dick and everyone for helping me out then. I think that thread is more than good enough to get me going this time. tomplum.boards.net/thread/6376/oh-sh1t-boiler-finally-packed |
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Post by dickpuller on May 5, 2024 13:35:30 GMT
If you can get a good ohms reading on the motor windings, then change the Bearings. But replace any seals at the Fan you disturb.
On old non-condensing boilers, the Fans are on the Negative side of the Burner, so hot Products of Combustion pass through them. They kill Fans!!
If you’re buying Boiler Spares, just use my GS number 666.👍👍
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Post by DIYDafty on May 6, 2024 12:02:05 GMT
If you can get a good ohms reading on the motor windings, then change the Bearings. But replace any seals at the Fan you disturb. On old non-condensing boilers, the Fans are on the Negative side of the Burner, so hot Products of Combustion pass through them. They kill Fans!! If you’re buying Boiler Spares, just use my GS number 666.👍👍 Getting infinite resistance across the terminals. Think that means its knackered? No quick fixes I take it? Will have to wait for the refurbished fan to arrive on Wednesday I suppose. You see this is why I call myself "Dafty". Not coz I'm thick but sometimes lack common sense. When I applied 240V to that fan on the bench there was nothing whatsoever - no hum, nothing and yet the fan spun nice and cleanly. So being a Dafty I thought it was the bearings. Oh dear.... I think to someone like you and many others on the forum, you'd know straight away this is a fault in the windings even before you took a resistance reading and saw no continuity |
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Post by dickpuller on May 6, 2024 13:16:05 GMT
If you can get a good ohms reading on the motor windings, then change the Bearings. But replace any seals at the Fan you disturb. On old non-condensing boilers, the Fans are on the Negative side of the Burner, so hot Products of Combustion pass through them. They kill Fans!! If you’re buying Boiler Spares, just use my GS number 666.👍👍 Getting infinite resistance across the terminals. Think that means it’s knackered? No quick fixes I take it? Will have to wait for the refurbished fan to arrive on Wednesday I suppose. You see this is why I call myself "Dafty". Not coz I'm thick but sometimes lack encommon sense. When I applied 240V to that fan on the bench there was nothing whatsoever - no hum, nothing and yet the fan spun nice and cleanly. So being a Dafty I thought it was the bearings. Oh dear.... I think to someone like you and many others on the forum, you'd know straight away this is a fault in the windings even before you took a resistance reading and saw no continuity Oh don’t be too critical on yourself Dafty, that’s my job😂😂 Yup, if you’re getting nothing on the winding, then yes it’s a new fan. But hey, strip the bearings off the fucked one. It’s good experience & you have a set when the next ones go👍👍 |
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Post by joinerjohn on May 6, 2024 22:40:43 GMT
DIY Dafty wrote,,, “When I applied 240V to that fan on the bench there was nothing whatsoever - no hum, nothing and yet the fan spun nice and cleanly.” Clearly ( I’m no sparky, but,,) if you applied 240v to the fan and it spun up, then it’s working. There couldn’t have been infinite resistance across the windings, because if the windings are open circuit, the fan wouldn’t have spun at all.  |
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Post by dickpuller on May 7, 2024 5:36:09 GMT
DIY Dafty wrote,,, “When I applied 240V to that fan on the bench there was nothing whatsoever - no hum, nothing and yet the fan spun nice and cleanly.” Clearly ( I’m no sparky, but,,) if you applied 240v to the fan and it spun up, then it’s working. There couldn’t have been infinite resistance across the windings, because if the windings are open circuit, the fan wouldn’t have spun at all. I think he means, he can turn it freely with his finger. Forgive him JJ, he can be a wee bit hard of thinking!!! |
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Post by DIYDafty on May 7, 2024 14:20:15 GMT
DIY Dafty wrote,,, “When I applied 240V to that fan on the bench there was nothing whatsoever - no hum, nothing and yet the fan spun nice and cleanly.” Clearly ( I’m no sparky, but,,) if you applied 240v to the fan and it spun up, then it’s working. There couldn’t have been infinite resistance across the windings, because if the windings are open circuit, the fan wouldn’t have spun at all. I think he means, he can turn it freely with his finger. Forgive him JJ, he can be a wee bit hard of thinking!!! Didn't know what he meant but I see now - yeah spun with my finger. As for the Intergas, from what you say the heat-only models don't suffer from this limescale issue ? |
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Post by DIYDafty on May 7, 2024 15:56:06 GMT
DIY Dafty wrote,,, “When I applied 240V to that fan on the bench there was nothing whatsoever - no hum, nothing and yet the fan spun nice and cleanly.” Clearly ( I’m no sparky, but,,) if you applied 240v to the fan and it spun up, then it’s working. There couldn’t have been infinite resistance across the windings, because if the windings are open circuit, the fan wouldn’t have spun at all. Just reread what I wrote and agree it makes no sense. I meant to say: When I applied 240V to that fan on the bench there was nothing whatsoever - no hum, nothing and yet without any power applied the fan spun nice and cleanly. |
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Post by joinerjohn on May 7, 2024 21:25:30 GMT
Ahhh I now see what you meant 🤣🤣🤣🤣
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Post by DIYDafty on May 8, 2024 17:36:12 GMT
Ahhh I now see what you meant 🤣🤣🤣🤣 What that he got it and you didn't ? |
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Post by joinerjohn on May 25, 2024 15:26:05 GMT
DIY Dafty wrote,,, “When I applied 240V to that fan on the bench there was nothing whatsoever - no hum, nothing and yet the fan spun nice and cleanly.” Clearly ( I’m no sparky, but,,) if you applied 240v to the fan and it spun up, then it’s working. There couldn’t have been infinite resistance across the windings, because if the windings are open circuit, the fan wouldn’t have spun at all. Just reread what I wrote and agree it makes no sense. I meant to say: When I applied 240V to that fan on the bench there was nothing whatsoever - no hum, nothing and yet without any power applied the fan spun nice and cleanly. To be fair Dafty, the part you added in highlighted text, did not appear in your original post. You added that afterwards 😉😉😉 |
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Post by dickpuller on May 26, 2024 5:58:23 GMT
Oh, you must forgive him JJ. He’s the Barry Bucknell of modern DIY. But Dafty wears Crocs instead of a shirt & tie.
The holes in his Crocs are full of Plaster & shit. Where, as we all know, the holes in Crocs are there to let your personality escape!!
He’s also got Barry’s south of England plummy accent😂😂😂😂
Jolly good!!
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