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- 24 May 2018
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I'm not a Gas Safe engineer but all the work I'm about to describe has been carried out by one so don't jump down my throat!! Potterton Promax Combi 24HE Plus LPG boiler. DHW has been getting gradually cooler, CH working fine. Got an overheat (E130) error on HW. Changed the overheat sensor with no difference. On advice from Potterton, changed the plate heat exchanger - no difference other than the overheat is a bit slower to trigger. Again on advice from Potterton, changed the main pcb. Now the E130 fault comes on when boiler is turned on with no HW or CH demand and cannot be reset. On advice from Potterton fitted another new pcb as that one must be faulty. No difference so it wasn't the pcb. Refitted the original pcb and back to square one (but with slight improvement as described above.) Anybody got any ideas what my engineer should try next as clearly Potterton don't, other than suggesting that I sack him and employ them!!