Problemas
A vehicle's alf conditioner blows cold air while driving at normal speeds, but n while sitting at stop lights. The LEAST likely cause of this condition is: A. An overheating engine. B. A weak electric fan motor. C. A frozen expansion valve. D. Debris in the condenser fins.
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Joaquín
maestro · Tutor durante 5 años
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(301 Votos)
Respuesta
The least likely cause of this condition is 'A. An overheating engine'.
Explicación
## Step 1The problem is about diagnosing a vehicle's air conditioning system that blows cold air while driving but not while sitting at stop lights. The options provided are potential causes of this issue.## Step 2Option A suggests that an overheating engine could cause this problem. However, an overheating engine would typically result in the air conditioning system not working at all, not just failing to blow cold air at stop lights.## Step 3Option B suggests that a weak electric fan motor could cause this problem. This is a plausible cause because the fan motor is responsible for blowing air through the radiator to cool the engine. If the fan motor is weak, it may not be able to blow enough air to cool the engine, which could cause the air conditioning system to fail at stop lights.## Step 4Option C suggests that a frozen expansion valve could cause this problem. This is also a plausible cause because the expansion valve is responsible for controlling the amount of refrigerant that enters the evaporator. If the valve is frozen, it could restrict the flow of refrigerant, causing the air conditioning system to fail at stop lights.## Step 5Option D suggests that debris in the condenser fins could cause this problem. This is another plausible cause because the condenser fins are responsible for dissipating heat from the refrigerant. If debris is blocking the fins, it could reduce the efficiency of heat dissipation, causing the air conditioning system to fail at stop lights.