alzmoore Posted June 8, 2020 Report Share Posted June 8, 2020 Hello, I've tried the following: Backflushed the heater core (from the outlet at the rear of the cylinder head all the way through to the connection back at the water pump. No dirt and full flow at mains pressure. Flushed both ways Tested the movement of the heater valve. It moves through 90 degrees from hot to cold (but I cant see the stop referred to in the manual) cracked the hose at the highest point on entry to the heater control valve to bleed out any trapped air (this resulted in a little bit of warmth, but it didn't last long) There is some kind of thermostatic control thing on the water valve. Could it be something to do with that...…………...i hope not as I've got no skin left on both wrists trying to reach the water valve. I'll cry if I have to change it...(or buy a warm coat) Thanks Alan Quote Link to comment Share on other sites More sharing options...
AndyPG Posted June 8, 2020 Report Share Posted June 8, 2020 Hi Alan, Almost certainly sounds like a fault with the heater valve. Do the pipes get hot to and from the heater matrix? Andy. Quote Link to comment Share on other sites More sharing options...
Gold FFM Chillidoggy Posted June 9, 2020 Gold FFM Report Share Posted June 9, 2020 Alan - Do a search for ‘Ranco valve’ on here, there’s info on TLF about it. And yes, they’re obsolete. Quote Margate Exotics. Link to comment Share on other sites More sharing options...
alzmoore Posted June 9, 2020 Author Report Share Posted June 9, 2020 Andy. No they don't. The pipe from the back of the head gets hot for as far down as I can reach Quote Link to comment Share on other sites More sharing options...
AndyPG Posted June 9, 2020 Report Share Posted June 9, 2020 Hi Alan, Unfortunately, everything points to the flow control valve. I think, in addition to knob control, there is a thermostatic part incorporated that helps moderate a steady set temperature. It sounds like its this part of the device that's giving the problems. When the water is cold, the flow is good. As soon as the thermostatic part sees some heat, it stops the flow even though the manual control is set to hot. Andy. Quote Link to comment Share on other sites More sharing options...
alzmoore Posted June 9, 2020 Author Report Share Posted June 9, 2020 Thanks Andy. As soon as the skin grows back on my knuckles I will try and get it out.. 1 Quote Link to comment Share on other sites More sharing options...
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