Valor Radiant Heater Piezo

[jmak]

How do you remove and disconnect a faulty piezo spark unit? It appears to be threaded in but there's no obvious way to remove it from the heater without breaking something.
Standard stand alone Valor gas heater model no 383x

 

[45yearsagasman]

You probably have to remove the outer case to gain access to a lock nut.Has the fire got a name as well as a number?

 

[jmak]

No name, just Valor Model 383X infra red heater.
I can get to the piezo unit inside the heater below the push button fairly easily but cant see any way to release it, like a locknut. Must be something there. I hoped I was missing something obvious!
Thanks