Heater blows cold air

Hello,

It sounds like you have a low coolant level. Does it blow heat at highway speed? If you turn the control from hot to cold can you feel a temperature change in the air coming out. With the car sitting still fully warmed up try reving the car up in short quick burst, like vroom wait vroom wait for about 3 or 4 minutes and see if the air gets warm.

Here is a guide that can help as well

https://www.2carpros.com/articles/car-heater-not-working

Please run down this guide and report back.

Good to hear, please use 2CarPros anytime we are here to help.

Heat can only be lost for a few reasons. However, I need to ask a few questions to know which way to go.

First, does the engine warm up to a normal operating temp?

Second, if it does, allow the engine to warm up and have the heater on high. Feel both heater core hoses that under the hood. They are smaller hoses (aprox 5/8"ID) and one goes from the water pump to the heater core via the firewall under the hood. The other will look the same but go either from the thermostat housing or engine block to the firewall. If the engine is warm and the heater is on, both should be hot.

Do that and let me know what you find. That will determine what needs done.

Let's make sure the heater hoses entering the firewall are hot when your rig is at operating temperature

if not, it's possible the heater core is stopped up (no circulation) taking the hoses loose and pushing water from your garden hose in both directions thru the core may unstop it

i did not find any sort of control valve in "prodemand", (there could be one!) That might "shut off" flow thru the system. So if it ain't pushing water ezily, be weary that there might be a valve preventing this operation

i'm banking on your hoses being hot, and the above procedure is not necessary!

There are blend doors within the unit that may be "stuck/ broken/ or the actuator just ain't-a-workin' to move them"

check your fuses, connections, this might be a power problem

the actuator itself may be inoperable

with a large (am I pretty!) Hand mirror and a good flashlight, you may be able to see the actuator (and whether it moves or not) when you move your controls.

According to "prodemand" you may have both a driver's side and passenger side door. I clicked on 3 different "figures" to see if they had multiple views (the same ole diagram came up each time) i'm posting the diagram below for you to click on

i hope this aids you

the medic

Sealer is always a bad idea as it sludges up the system.

It sounds like the heater core is clogged with debris and needs to be power flushed

Roy

Check the thermostat, heater core and air blend door-

Check to see if actuators are working and check relay and fuses. Generic pic for actuators inclosed.