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
either low on collant or a failing water pump
Sounds like your cooling system termostate is stuck open.
The heater is blowing out cold air only
It sounds like your switch from hot to cold is stuck on cold