Dealing with horsebox repairs isn't easy, but it can much easier with the tips and advice you're about to read. No one wants to find out that their horsebox needs work done. However, it doesn't have to break your bank or make you want to rip your hair out in the moment.
Monitor your radiator. Let the horsebox run briefly, shut the engine, then open the hood. Never open the radiator cap if the engine is running. Use a dipstick to check the amount of fluid in the radiator. You should also make sure to mix coolant fluid with water before you pour it into your radiator.
It is not legal for a mechanic to start working on your horsebox before you officially authorize them to do so, usually by signing a contract. Be careful what you authorize the mechanic to do. You should only sign documents that include a detailed list of the needed Cotswold horse box builder and their prices.
If you have doubts about the work of a mechanic or their diagnosis, ask if you can see the old damaged parts. A good mechanic will show you the part and point out the issues. If a mechanic cannot show you the old damaged parts, you need to check your horsebox to make sure the mechanic actually put some new parts in.
Make sure you get a signed copy of the estimate for the repairs. You also need to make sure that the contract contains a clause that the shop must contact you before exceeding the total on the estimate. This will protect you from getting a surprise bill once work is completed.
Don't have a bunch of keychains on your keyring, or make sure you can remove your key when you need it. The ignition cannot hold the weight of a big key chain. If your keys starts sticking, you need the tumblers replaced.