03 f250 desel heater is hot and cold every 30 seconds?
Check thermostat, if that's ok make sure the system is full of coolant. If you have recently changed a cooling system part (water pump, thermostat, heater core, etc.) then you may have an air pocket in the system which will make you think it is full of coolant but actually is not, thus intermitten heat. Hope this helps.
I have a 94 ford explorer but just recently the heat stopped working and only blows out cold air. every once in a while it will turn on but only for a couple seconds. what could be the problemHELP?
The heater is blowing out cold air only Read More
Your gas heater is blowing cold air The furnace flame will turn on for about 10 seconds then shut off It only turns on about once every 5 minutes Any ideas?
Probably the flame sensor. Read More
If water is only drawn from the cold faucet, then no, the water heater is not involved. However, if water is drawn from the hot faucet- even for a few seconds- hot water IS withdrawn from the heater, and fresh cold water drawn in to be heated- even if the hot water did not make it all the way through the pipe to the faucet- and the water heater will work to heat that fresh… Read More
Low coolant, or a plugged up, dirty system. Read More
How do you know if the block heater on a 1995 K2500 Diesel suburban is working because mine won't start in cold weather even after being plugged in all night?
When you first plug in the heater have the hood open and in a few seconds you should be able to hear the heater kicking in. It will make a sizzling noise. Read More
If you are saying the heater is blowing out cold air you need to change the heater core which is located inside the dash Read More
Your heater will blow cold air only. Read More
Why do they call it a hot water heater if it heats cold water. Shouldn't it be called a cold water heater?
It is just a water heater. People just say hot water heater without thinking. Read More
On a 1995 Gmc sierra truck why does the air conditioning vents on dash work in every mode except cold air cold air will only blow out from floor vents?
The a/c - heater controller is out........... Read More
It is because your heater is having to heat up so its blowing cold air out while its heating up.This means your heater is not very efficient and it needs to be checked. Read More
A car heater taps off engine heat. If you aren't driving, then the engine is cold and there's no heat for the car heater to use. Read More
You need to clean or change your heater core Also check your rad cap to be sure that it holds the pressure change it every 2 years minimum Read More
My 01 town and country heat blows hot for about 30 seconds then it gets cold i changed the thermomstat and water pump and it still does the samething what can you do?
Try flushing the heater core. Read More
Get the air out of your heater core. Read More
Interior heat uses the engine heat. If the engine is still cold, the heater will blow cold. If the engine is warm and the heater is blowing cold, you have a problem with the heater. Check the water in the radiator and see if it is rusty. If it is rusty, change your coolant, thermostat, and hoses. Look at the heater hoses when someone steps down on the gas pedal. If a hose collapses, replace… Read More
The most common reason the heater is blows cold air on a 1999 Ford Winstar is a bad thermostat or blocked heater core. Read More
The purpose of a heater is to heat up the room when it is cold; by using gas Read More
I don't think so because when we have a cold, it is best to keep oneself warm and thus the heater produce heat for us to keep warm. Unless we have a lousy heater which produce cold air instead of heat, haha! Read More
Pretty cold Read More
replace front heater corefront and rear have independent heater cores Read More
Hot water heater the we just rerouted from bathroom to attic isn't filling... no leaks and cold water works and the tank will only fill when cold water is going ... anyone know anything about that?
Check piping. Make sure cold line going into cold side of water heater and hot side coming out hot side. Cold feed for water heater should come off main cold line. Make sure valves are open to and from water heater. Read More
1998 Mazda b2500and when you turn the heater buttom to make it blow cold air doesn't change and still on heat?
if youre trying to turn the heater on and cold air comes out, then its most likely the heater core Read More
you need to replace your heater core Read More
faulty control valve on heater or air in the lines Read More
Low coolant and a clogged heater core are possibilities. Read More
My heater doesn't go cold. But to answer your question, check the engine coolant level in the radiator. Be sure that the engine is cold before removing the radiator cap. --Ken Read More
Hot water is lighter then cold water so it would stay up on top of cold water till both waters naturalize to the same temp. a good example is a water heater and (if its not to old) open your drain at the bottom of the water heater and if your dip tube is still good you should always get cold water out of it even if the water heater is on and your water… Read More
try to ON or wait the heater first for a few seconds, then start the engine for diesel engine and gasoline engine. specially in cold country. Read More
You may need to replace your Thermostat or your Heater Core. Read More
you must have low coolant or a bad heater core Read More
heater core possibly plugged and leaking Read More
I have a 97 Buick Lesbre thermostat control temp blink every time I start my car and also blow cold air out what could be the problem? Read More
The duration of Cold Lazarus is 3600.0 seconds. Read More
I assume your car heater is blowing cold air, when the heater is on. It seems that, you have air on your coolant. that air pockets blocks the cooland to travel through your heater. it may be a sign of a bigger problem such as blown head gasket in the old cars, such acura legend Read More
COULD BE A BAD HEATER CORE COULD BE A BAD HEATER CORE sounds like the heater control switch needs replacing.if that doesnt fix it, you need new heater core Read More
The #1 cause of cold air from the heater when the car is stopped, or the engine is idling, low engine coolant levels. Read More
did you check the heater core because my truck did that and that was what was wrong Read More
More than likely your heater core is plugged, and will need to be replaced Read More
you may not have the heater water hoses plugged in Read More
Low on coolant, stuck open thermostat, plugged heater core, faulty temperature blend door, Read More
The heater might blow cold air in a 2000 Silverado because the thermostat is sticking and not changing from cold to heat. The thermostat is usually located in a hose that leads from the radiator to the motor. Read More
can you please clarify what you mean, do you mean that the front heater blows cold but the rear blows hot or do you mean that when the heating is on cold it blows hot? many thanks paul Read More
Personally I would not, as the cold water could thermo-shock the heater. And if you have a glass-lined tank, it will crack it and shorten the life of the tank. I would follow the manufacturer's instructions. Read More
Why would when you put the heater on it heats then goes cold When you push hard on the dial it starts to blow hot when you let go it gets cold even when it is on hot?
heater switch needs replaced Read More
Why does the temperature gauge act erratic goes from cold to hot quickly then drops to cool When in red there is no heat from heater When in cool there is hot air from heater?
Low coolant, check when engine is cold. Read More