Коль скоро из-за воздушной пробки теплоотдача стала слабой, нужна продувка.

Коль скоро is a rather formal or bookish way to say since, seeing that, or if it is the case that.

In this sentence, it introduces the reason:

• Коль скоро ... теплоотдача стала слабой, нужна продувка.
• Since the heat transfer has become weak, purging/bleeding is needed.

A learner should know that this is not the most common everyday phrasing. In ordinary speech, Russian would more often use:

• поскольку
• раз
• так как

So коль скоро sounds more formal, technical, or stylistically marked.

Because из-за requires the genitive case.

So:

• воздушная пробка = nominative, dictionary form
• из-за воздушной пробки = genitive

The forms are:

• воздушная → воздушной
• пробка → пробки

Literally, из-за means because of or due to.

So:

• из-за воздушной пробки = because of an air lock

Yes, пробка can mean a traffic jam, but here it means a blockage or plug caused by air.

In technical contexts, воздушная пробка usually means:

• an air lock
• air trapped in a system, preventing normal circulation

So this is not about cars or roads. It is a technical use of пробка.

Because after the verb стать meaning to become, Russian often uses the instrumental case for the predicate adjective or noun.

So:

• теплоотдача слабая = the heat transfer is weak
• теплоотдача стала слабой = the heat transfer became weak

Here:

• слабая is nominative feminine singular
• слабой is instrumental feminine singular

This is a very common pattern:

• он стал врачом = he became a doctor
• она стала счастливой = she became happy

Because the subject is теплоотдача, which is a feminine noun.

In the past tense, Russian verbs agree with the subject in gender and number:

• masculine: стал
• feminine: стала
• neuter: стало
• plural: стали

So:

• теплоотдача стала = heat transfer became

Теплоотдача is a technical word meaning heat transfer, heat emission, or heat dissipation, depending on context.

It comes from:

• тепло = heat
• отдача = giving off, release, отдача

In engineering contexts, it often refers to how effectively heat is passed from one medium or surface to another.

Because продувка is a feminine singular noun, and нужен / нужна / нужно / нужны must agree with it.

So:

• нужен = masculine singular
• нужна = feminine singular
• нужно = neuter singular
• нужны = plural

Since продувка is feminine:

• нужна продувка = purging/bleeding is needed

This construction is very common in Russian:

• нужна помощь = help is needed
• нужен ремонт = repairs are needed
• нужно время = time is needed

In a technical context, продувка means something like:

• purging
• blowing through
• bleeding the system

The exact English translation depends on the system being discussed.

Since the sentence mentions an air lock and weak heat transfer, продувка probably means removing trapped air by forcing air or fluid through the system, or by bleeding it.

So the idea is: the system needs to be cleared so normal circulation and heat transfer can resume.

Because the sentence begins with a subordinate clause introduced by коль скоро.

Structure:

• Коль скоро из-за воздушной пробки теплоотдача стала слабой, = subordinate clause
• нужна продувка. = main clause

In English, this is like:

• Since the heat transfer became weak because of an air lock, purging is needed.

Russian normally separates that initial subordinate clause with a comma.

Yes. Russian word order is flexible, especially in technical or written language.

This sentence could be rearranged, for example:

• Нужна продувка, коль скоро из-за воздушной пробки теплоотдача стала слабой.

But the original order is natural because it presents:

1. the reason/problem first
2. the required action second

That is often a very logical order in technical writing.

It is grammatical and understandable, but it sounds somewhat technical and a bit formal/bookish, mainly because of коль скоро.

More everyday versions might be:

• Из-за воздушной пробки теплоотдача стала слабой, поэтому нужна продувка.
• Поскольку из-за воздушной пробки теплоотдача стала слабой, нужна продувка.

So the sentence is fine, but it does not sound casual or conversational.