Dear Sir, I am writing to tell you about the problem in the flat. The heating is not working and this is very bad. I hope you are doing well.
IELTS General Training Writing: Task 1 is a letter. That does not make it the easy Writing test.
The first task changes from Academic, but the discipline does not. You still have to read the situation properly, write for the right recipient, cover every bullet point and keep the tone appropriate.

General Training Writing is 60 minutes. Task 1 asks you to respond to a situation by writing a letter of at least 150 words, usually in about 20 minutes. Task 2 is an essay of at least 250 words, usually in about 40 minutes. Task 2 carries more weight.
Your grammar can be clean and the letter can still be wrong for the recipient.
IELTS calls the Task 1 criterion Task Achievement. For General Training, that includes how well the letter achieves its purpose.
Who is “Sir”? Is the task a landlord you know, a housing office or somebody else? What exactly do you want them to do? Which bullet points must be covered? Tone is not a decoration added after grammar; it comes from the relationship and purpose.
Dear Mr Collins, I am writing to ask for an urgent repair to the heating system in my flat, which has stopped working during the current cold weather.
The purpose and request are clearer. The rest of the letter still has to cover the task’s bullet points and use the right level of formality.
Before writing, note four things: recipient, relationship, purpose, three bullet points. If you cannot state those quickly, do not start drafting yet.
Build My Roadmap for direction, use the Diagnostic for a repeated unclear blocker, or use the Fit Call to check the right support.
Task 1 changes. Task 2 remains an essay.
Speaking and Listening are the same across Academic and General Training, but Reading and Writing differ. In Writing, the biggest visible difference is Task 1.
Task 1: letter
Task 2: essay
Time
Marking
Can you plan the letter before you start decorating the language?
Tick only what your latest timed letter proves.
Use a 60-second skeleton.
Write the recipient, purpose and one line for each bullet point. Then decide the tone. Only after that should you draft the full letter.
Use the official format, then diagnose from your own letter.
Sources
QuickTalk Tutor examples are original practice material and do not guarantee a band score.