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Heating and Cooling Problems

Among the many issues that J&A Fleet Maintenance can respond to at a moment’s notice are heating and cooling problems. This can be an issue all year, whether in extreme heat or cold, especially if you run a lot of freight. Here are some things to watch out for.

1. Dysfunctional thermostat

A broken thermostat on a semi-truck can be a serious problem. If the truck is not properly cooled, the engine could overheat, causing expensive damage. The best way to deal with a broken thermostat is to replace it as soon as possible. Fortunately, this is a relatively easy repair that can be done by most mechanics.

However, it is important to make sure that the new thermostat is properly installed and calibrated. Otherwise, the engine could still overheat, potentially causing even more damage. With a little care and attention, a broken thermostat on a semi-truck can be fixed without too much trouble.

2. Blown Head Gasket

If the gasket is not repaired or replaced, the truck will eventually overheat and break down. In addition, the truck will probably lose power and will not be able to run at high speeds. The best way to avoid a blown head gasket is to have the truck serviced regularly and to check the gasket for leaks.

If a leak is found, it should be repaired immediately. A blown head gasket can be a costly repair, but it is worth it to keep the truck running smoothly.

3. Defective Radiator Cap

A radiator cap is a vital component of a truck’s cooling system, and a defective radiator cap can cause a number of problems. If the cap does not seal properly, coolant can leak out, leading to engine overheating. In addition, coolant level sensors may give false readings, causing the truck’s computer to shut down the engine prematurely.

Replacing a defective radiator cap is relatively simple and inexpensive, so it’s important to check the cap regularly and replace it if necessary. By taking this simple step, you can help avoid more costly repairs down the road.

4. Bad Water Pump

If you’re a truck driver, then you know that a bad water pump can mean big trouble. Not only will it cause your engine to overheat, but it can also lead to serious engine damage. There are a few telltale signs that your water pump is on the verge of failure.

For example, if you notice that your engine is running hot, or if there is coolant leaking from the pump, then it’s time to replace it. A new water pump can be a costly investment, but it’s worth it to keep your truck on the road.

5. Coolant Leak

One of the most common mechanical problems that commercial truck drivers face is a coolant leak. Coolant leaking from the radiator can not only lead to overheating, but it can also cause engine damage. A small leak can quickly turn into a big problem, so it’s important to catch it early and take action.

The first step is to identify the source of the leak. If you see green or orange fluid on the ground, it’s likely that the radiator is the culprit. Once you’ve located the source of the leak, you’ll need to repair or replace the damaged part. In some cases, a simple radiator repair kit will do the trick.

However, if the leak is severe, you may need to replace the entire radiator. No matter what course of action you take, be sure to keep an eye on your coolant levels and check for leaks regularly. By taking these precautions, you can help avoid costly repairs and keep your semi-truck running smoothly.

Know Thy Truck to Avoid Serious Heating and Cooling Problems

Keeping your semi-truck (or fleet of semis) in good condition is important for a number of reasons. Not only will it help you or your drivers stay safe on the road, but it can also save you money in the long run.


By keeping up with regular maintenance and inspections, you can prevent common problems like air pressure differences and poor heat distribution. So if you’re looking for a way to keep the trucks running smoothly year-round, be sure to keep a watchful eye on all of the above. And if you should encounter issues of any kind, just know that J&A Fleet Maintenance is merely a phone call away!

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