How to fix front flapp

It should be quite simple. There's two means of adjustment. On the flap is a "claw" that can be adjusted in/out with a cross-point screwdriver. That meets up with a spring-loaded locator which can be adjusted side-to-side with a torx screw. One or the other adjustment will get things working

David
 
You will probably find the tapered latch has got stuck in its housing - it’s a common issue that happens over the winter. Spray some wd40 or similar oil and then work the wedge until it pops back out to its normal position . It should look like a Yale lock latch on a front door of your house. Good luck.
 
One of mine also has an issue where the grey knob that secures the hood in place turns on its metal rod, leading to the knob no longer being straight when tightened, which means it no longer fits the indentation in the flap. This means the flap can no longer close as tightly as it should and thereby possibly not reach the catch.
Likely fixable with the aforementioned catch adjustment, just a different source of the problem. The flap will stay "further out" on the sides though. (Unfortunately I haven't found a good fix for the knob turning when it shouldn't)
 
Thanks Seb and a2 sumo ! Going to give it a go tomorrow and thanks to all the members with their advice I,m a retired builder of 50 years and volunteered on a lot of good causes including DIY sos hence the photo and I feel good to offer help and expertice,anyway enough of me spouting off.
 
Both @Seb_Gurkyh and @a2sumo have given really good advice. The correct locking position of both bonnet knobs is vital as is an lock release that is not all gunged up. Once happy both of those conditions are met then look at the part on the service flap that is secured by the lock. It should be intact with no burrs and securely fastened. Again if this is now OK close the flap, noting where the lock is and firmly push the flap closed. Hopefully the flap now locks. What if it still does not lock, then you will need to adjust either the tongue on the flap or the stroke of the lock, before you adjust anything mark around the fixings as to where the current positioning is. If it all goes wrong at least you can go back to where you started from. The flap needs to be locked firmly onto the bonnet otherwise the alarm microswitch will not close enough and can either move and set off the alarm or not be pressed in enough to set the alarm. Easy solution for this is to glue a 2-3mm washer onto the little square on the flap that pushes against the microswitch. This will ensure enough throw on the microswitch to not produce false alarms.
 
After fixing hundreds of locks ,window catches ,adjusting bifold doors and upvc Windows and doors this should be easy yes?soon find out Hah! Hah!
 
Have someone sit in the drivers seat. You drop down the service flap and observe the plunger as you assistant carefully pulls the release handle under the dash. You should see the plunger retract to the right and when they release the handle the plunger move smoothly back towards the left. If slow to move or not returning fully then really flush the are well with WD40 or similar until the plunger is free to retract and extend back into the locked position. These are only plastic parts so do not start using pry bars or screwdrivers.
 
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