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cheers for that. I had a couple of engineers (if you could use that word) turn up to my house on their horses last night. They changed the thermocouple, bled some water and had gave the gas valve and boiler a good old bashing with a spanner! They had no joy getting the pilot lit...

After about a year of no use, the sub zero temparatures have prompted me to get my central heating back in order (the electric fans are lightening my pockets daily!). The Servowarm CH system in my house is pretty ancient - no idea on the model number etc. Brief description of it: - Gravity...