Defender TD5 Hot & Cold

Hi Guys,
I'm new to the forum and I drive a 2004 Defender 90 G4 Edition TD5
I've just got my beloved out of the garage last week for the winter and sent her for a fresh MOT no worries !!!
I've been using her for the last couple of days and I've noticed that the heater is blowing Hot & Cold
goes cold especially on very low speed or tick over ?
I've checked the coolant and all seams well but obviously it isn't
Any suggestions would be appreciated ???

Welcome to the forum

Ask yer tech question in the tratter section over ere where more tratter owners will see it:

https://www.landyzone.co.uk/forum/defender-90-110-130.7

Thanks for your attention & advise I'm hoping you meant in the link below your message
I'm completely new to this site and to be completely honest it's the only forum I've ever joined
( COMPLETE TECHNOPHOBE )

Dun't worry we were all new once. There's a list of different sections of the forum below. Lots of vehicle specific technical sections. Ava look round and enjoy. Just be careful of Anything Goes section. Tis quite rough int there.

https://www.landyzone.co.uk/forum/