If a 2004 Vectra is only blowing cold air, it could be due to several issues. Common causes include low refrigerant levels in the air conditioning system, a malfunctioning compressor, or a faulty thermostat. Additionally, issues with the blend door actuator, which controls the mix of hot and cold air, could also prevent warm air from entering the cabin. It's advisable to have the vehicle inspected by a professional to diagnose and resolve the issue.
Same problem vectra heater only blowing cold checked water coolant and it was empty. Topped up now blowing hot just hope I not got head gasket probe
Is it blowing cold air only or not blowing any air at all.
it is blocked and needs to be flushed out
when turning on air conditionor for cold air only get hot
This means your Jimmy is pregnant with a Jenny.
blowing cool air, is the air only in your mouth... warm air comes from your lungs. temperature also varies by how open your mouth is while blowing air out
you may want to check your coolant level.
Cold start
The heater is blowing out cold air only
Sounds like your cooling system termostate is stuck open.
either low on collant or a failing water pump
Your furnace may only be blowing cold air due to issues such as a malfunctioning thermostat, a clogged air filter, a problem with the pilot light or ignition control, or low fuel supply. It is best to consult a professional HVAC technician to diagnose and fix the problem.