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Belmont
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No heat from climate control
« on: Jun 13th, 2024, 7:01pm »
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Hi
Just noticed I'm getting no heat from the climate control just cold air when on high. Engine temp is fine and I don't think the heater matrix has been bypassed and my front screen demister only works on the passenger side but that is a separate issue. Any ideas?
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Jackattack2002
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Re: No heat from climate control
« Reply #1 on: Jun 14th, 2024, 6:12pm »
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Can only be one of two things.  Either the heater matrix (or flow to it) is completely blocked, or the vent control flaps have seized (although very unlikely) in the wrong position.  To start with, feel the matrix hoses (engine bulkhead) to check they are not cold.  If they are cold, you will need to drain the coolant and locate blockage.  If it is the matrix, it's the worst job ever to replace.  The matrix can sometimes be cleaned with an overnight Oxi-soak and then reverse flushing with a hosepipe.  Good luck Smiley
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Snoopy
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Re: No heat from climate control
« Reply #2 on: Jun 15th, 2024, 7:23am »
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One question .  
Have you reset the climate control system?
 
Instructions on how to do the procedure is [HERE]
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Pegasus
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24V Cosworth  Ultima Born: Sept 97, sold Aug 23

   
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Re: No heat from climate control
« Reply #3 on: Jul 7th, 2024, 11:18am »
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I changed my matrix way back when. It's eminently do-able but a complete faff. Took a full day of dismantling, 10 mins to swap new for old, then next day putting it all back together again. That was for the Cosworth: part of inlet manifold off; dash, centre console, steering wheel, glove compartment out etc. There's info/write up (not mine) on the site somewhere.
 
You need to be thorough and remember what screws/bolts go where and fairly physically flexible (or have someone who is) esp when lying in the footwells trying to access bolts, etc to gain access.
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