اگر کولر تا امشب کار نکند، فردا به تعمیرکار زنگ میزنیم.

اگر means if and introduces the condition. In this sentence, the condition is اگر کولر تا امشب کار نکند = if the cooler/air conditioner does not work by tonight.

Persian often places the if-clause first, just like English can:

• If the air conditioner does not work by tonight, we’ll call the repairman tomorrow.

But Persian can also change the order if needed.

After اگر, Persian very often uses the present subjunctive for a future or uncertain condition.

So:

• کار نکند = does not work / should not work / if it doesn’t work

This is different from:

• کار نمی‌کند = it is not working / it doesn’t work as a normal statement

So in conditionals, اگر ... نکند is the natural pattern:

• اگر بیاید = if he/she comes
• اگر نرود = if he/she does not go
• اگر کار نکند = if it does not work

The verb کار کردن literally means to work, to function, or to operate.

So کولر کار نمی‌کند / کار نکند means:

• the air conditioner is not working
• the cooler does not function

Here, کار نکند refers to the device functioning properly, not to doing work in the human sense.

تا امشب means by tonight or until tonight, depending on context.

In this sentence, the best sense is by tonight:

• اگر کولر تا امشب کار نکند = if the air conditioner still doesn’t work by tonight

So تا gives a time limit or endpoint.

Examples:

• تا فردا = by tomorrow / until tomorrow
• تا شب = by night / until night
• تا آخر هفته = by the end of the week

In Persian, the present tense often expresses a future action, especially when a time word makes the future clear.

Here, فردا already shows the action is in the future:

• فردا به تعمیرکار زنگ می‌زنیم = tomorrow we’ll call the repairman

So Persian does not need a separate future form here.

A more explicitly future version is possible:

• فردا به تعمیرکار زنگ خواهیم زد

But in everyday Persian, می‌زنیم is much more common and natural.

زنگ زدن is the standard Persian expression for to call someone, especially by phone.

Literally, زنگ means bell and زدن means to hit/strike, but together زنگ زدن means:

• to ring
• to call

So:

• به او زنگ می‌زنم = I call him/her
• به تعمیرکار زنگ می‌زنیم = we call the repairman

This is a very common idiomatic expression and should be learned as a unit: زنگ زدن به کسی = to call someone

Because the verb pattern is:

به کسی زنگ زدن = to call someone

So the person being called is introduced with به:

• به دوستم زنگ زدم = I called my friend
• به دکتر زنگ بزن = call the doctor
• به تعمیرکار زنگ می‌زنیم = we’ll call the repairman

So به is required by this expression.

تعمیرکار means repairman, repair technician, or someone who fixes things.

It comes from:

• تعمیر = repair
• کار = worker / doer

So a تعمیرکار is literally a repair worker.

Depending on context, in English you might translate it as:

• repairman
• technician
• repair technician

Persian does not have a word exactly like English the in most cases. A bare noun can often mean:

• the repairman
• a repairman

The context tells you which one is meant.

So:

• به تعمیرکار زنگ می‌زنیم can mean we’ll call the repairman or we’ll call a repairman

If you want to make it clearly indefinite, you can say:

• به یک تعمیرکار زنگ می‌زنیم = we’ll call a repairman

Yes. Persian often puts the condition first, but the order can be changed.

Original:

• اگر کولر تا امشب کار نکند، فردا به تعمیرکار زنگ می‌زنیم.

Possible reordered version:

• فردا به تعمیرکار زنگ می‌زنیم اگر کولر تا امشب کار نکند.

The first version is more natural and clearer in most cases, but both are understandable.

The comma separates the if-clause from the main clause:

• اگر کولر تا امشب کار نکند = condition
• فردا به تعمیرکار زنگ می‌زنیم = result

It works very much like English punctuation in:

• If it doesn’t work by tonight, we’ll call the repairman tomorrow.

In informal Persian writing, commas are sometimes inconsistent, but here the comma is helpful and standard.

Usually, yes. In everyday Iranian Persian, کولر commonly refers to a cooling device such as:

• an air conditioner
• an evaporative cooler
• a cooling unit

So the exact English translation depends on context. In many learning contexts, air conditioner is the most natural translation.

The more standard spelling is می‌زنیم with a half-space after می.

So:

• standard: می‌زنیم
• common non-standard typing: میزنیم

Both are understood, but می‌زنیم is preferred in careful writing.

The same applies to many present-tense verbs:

• می‌روم
• می‌کنم
• می‌گوید

A helpful transliteration is:

agar kuler tâ emshab kâr nakone, fardâ be ta'mirkâr zang mizanim

A few notes:

• اگر = agar
• کولر = kuler
• تا امشب = tâ emshab
• کار نکند is often pronounced closer to kâr nakone in everyday speech
• فردا = fardâ
• تعمیرکار = ta'mirkâr
• زنگ می‌زنیم = zang mizanim

In careful written grammar, نکند is the form, but in colloquial pronunciation it often sounds like nakone.