Truck or van owners and distributors, greengrocery, vehicle refitting factories use refrigerated trucks or vans equip with transport refrigeration units to transport varied chiller or frozen products, like fresh fish(in ice), fruits and vegetables, cooked or sweet dishes, milk, fresh meat, etc. So it is normal that we sometimes smell something unusual in the refrigerated trucks with truck freezer units or vans with van chiller units. It might just mean that there have something trouble in the foods and have a mildew problem, though. We can not be take it lightly for this may be the sign of a serious mechanical problem. So it's important you diagnose and eliminate any refrigerator car with transport cooling system smells for some of them can be very dangerous.
Method 1 Diagnosing Exhaust, Sulfur, and Gas Smells
①Determine whether you have a leak in your exhaust system.
Smelling exhaust in a vehicle is an incredibly dangerous situation because carbon monoxide is toxic for human beings. So if you smell exhaust within your refrigerated trucks with truck freezer units or vans with van refrigeration systems , get the checked out by a professional immediately.
There could be a hole in anything from the muffler to the tailpipe of your refrigerator car with transport refrigeration units.
It’s also possible that exhaust is leaking into the car through a part of the interior that is worn. Don’t play around with this scenario. It’s extremely dangerous.
②Replace your catalytic converter.
If you smell a sulfur or rotten eggs smell, you’re probably going to need to get your refrigerated trucks or vans with transport cooling system serviced by a professional.
Usually, the smell of sulfur indicates there is a problem with your catalytic converter. The converter will probably need to be replaced.
The way this is done is to cut the converter on both ends after the engine cools. Then, replace it with a new converter.
③Replace your fuel filter.
Other causes of rotten eggs smells can include hot engines or broken fuel pressure regulators. All you might need to do for the latter is replace your fuel filter.
A rotten eggs smell is probably the result of hydrogen sulfide. Sulfur is present in gasoline, and it’s converted to sulfur dioxide, which is odorless. However, when your converter breaks down or its filtering layers are worn out, sulfur produces a strong smell of rotten eggs.
Gasoline smell signals a problem with the car. However, it might be easy to fix if the refrigerator car is just flooded.
If the refrigerator car isn’t starting, flooding is a distinct possibility. Just wait a few minutes, and try to start the refrigerator car again.
If the gas smell seems to be emanating from underneath your hood, your fuel injection system or carburetor might be leaking fuel. You can also check your fuel pump for a streak of leaking gasoline, which should be clearly visible.
⑤Check fuel lines and hoses.
You will also want to check the fuel lines and hoses inside your hood that lead to the fuel tank. It’s possible they’re disconnected or rotted.
You might want to check under the hood again after parking the refrigerator car overnight. You will want to look for stains because gasoline evaporates pretty quickly.
Make sure not to smoke cigarettes while looking for gasoline leaks. This can be very dangerous. It’s also possible that you spilled some gasoline while pumping it into your refrigerated trucks with truck freezer units or vans with van chiller units. Maybe the gasoline you smell is that which dropped onto your hands!
Method 2 Diagnosing Burning Smells
①Lighten up on the clutch and brakes.
If you smell burning toast while you’re working the gears of the refrigerator car, this is probably an issue with your clutch. But it could also be your break pads.
You could be riding the clutch pedal too hard, which creates friction between the clutch facing and the clutch slips. If you lighten up on it, the smell should disappear. The material is made of paper, which is why the smell has the faint odor of burning paper.
If you’re pressing your brakes too hard, you might be overheating your brake pads. This can also cause a burning smell. It could help to downshift. You also could have a dragging brake because a brake caliper piston might have seized. Another possibility is to make sure you didn’t leave your handbrake on while driving.
One way to check the brake pads is to see if any of your wheels feels hot. If none of them does, then maybe it's the overheated clutch instead of a dragging brake shoe.
②Check to see if the engine of your refrigerator car is overheating.
Figure out why you smell oil burning. Burning oil has an odor that is thick and acrid. When you smell it, you need to determine right away whether you are running out of oil.
Another possibility is that your refrigerated vehicle engine is overheating. If neither one of these things seems to be the answer, check to see if there is oil leaking onto your refrigerated vehicle engine block. You may need an oil change if you are smelling burning oil.
You could also check your transmission fluid using a dipstick. Maybe your transmission fluid is low. This can cause it to burn in the transmission because the gears get too hot because they are not properly lubricated.
③Check for a loose hose.
If the smell is closer to rubber burning than oil burning, check to see if a hose came loose under your hood.
It’s possible that it’s touching a part of the hot engine. Sometimes an oil smell is from a leaking crankshaft seal.
If that’s the case, you’ll also find oil on the pavement beneath the refrigerator car most likely.
④Check to see if your coolant is leaking if you smell maple syrup.
If the car smells like maple syrup after you’ve warmed up the engine (or even after you’ve shut it off a few minutes later), you should take immediate action.
This smell might mean that your coolant is leaking from somewhere like a radiator or heater hose. This kind of a problem means it's a good idea to take your refrigerated trucks or vans with transport refrigeration units into a professional.
If you smell maple syrup outside the refrigerator car, this might mean that you have a leaking radiator cap or that the radiator itself has a leak. If you smell it inside your refrigerated vehicle instead, this might mean that your heater core has gone bad.
PHOTO: Guchen Thermo TR-350 truck freezer units install on the mitsubishi fuso refrigerated trucks
Method 3 Making Your Car Smell Better
①Cleaning the bodies of refrigerated trucks with truck freezer units and vans with van chiller units regularly to remove dirt, which is the basic way to make refrigerated vehicle smell better.
②Don’t let trash accumulate in your refrigerator car. After transporting goods, it is necessary to clear it up immediately, especially after a long-time and long-distance transporting. In the driving seat, keep a small plastic bag in the refrigerator car to immediately deposit trash inside, and throw it away every few days or even every day.
③It is useful to put vanilla or another scent on cotton balls, and leave them in your refrigerator car. Or you could put a container of ground coffee in the refrigerated vehicle.
④Get rid of the moisture that's causing the mildew. Take a rag, and wipe off any moisture that you can find. If you see any mildew or mold on the area, use a nylon scrub pad to remove it. Try not to scratch the refrigerator car.
PHOTO: Guchen Thermo C-200T van chiller units for 2-10 m³ boxes install on the small cargo van