My crv heat does not work well. Takes forever to heat if it does at all. The thermostat rarely moves from cold. Warm weather there is not a problem.

have the thermostat replaced if the weather is very cold it will still take a while to heat up.

1- first off, it takes a good, engine thermostat to get good heat.
(input) (its called a heat exhanger) bad input ,gives bad output.

we connect a scan tool an see ECT at 180F or more, holding and in the normal driving distances, if you STAT is 2001, its old and slow, get it out of there. if true. old stats can cause overheating and engine damage to any sign of sluggishness or wrong temps, its kicked to the curb, fast. ( if a smart cookie) LOL.
Second, is the fan, yours works. end fan.

Third,are the dampers , these must change at your command.
the FSM covers these tests. do you want to do them.?

its at alldata.com too.. login and read HVAC.

generally means a bad thermostat

Bad news ,nothiong worse than a cold car so iam assuming this is a 16v job and the thermostat is behind the timing belt which is a summers day type job ,so as a temporary fix put a sheet of cardboard in front of the rad till the weather warms up this will make the engine run hotter and the cars internel heater radiator will be all the cooling it needs in the cold weather

could be the thermostat if it was just stating to go bad,could also be a vacume problem not letting the door for the ac/heat close all the way for a few min.and if its really cold out like below 35,then its going to take longer to warm up,my jeep takes like around 20 min at idle to warm up.yours could be a case of over cooling in cold weather too ie(electric fans on before it warms up)that would be the thermostatic sensor.

You may also want to check and see if the thermastat is working.If the thermastat is stuck open in cold weather car will take forever to warm up.This controlls the water flo from the engine to radiator.this will also make car run much colder(temp gauge will not register much change).

the engine cooling system thermostat could be stuck open. This will cause the engine to take forever to warm up, especially in cold weather. The thermostat is inexpensive and easy to change. A new one could fix your problem quickly.

It is possible that your thermostat is stuck open. Normally, the thermostat remains closed when starting cold, confining coolant to the engine block and cylinder head until it heats up. Once the coolant in the block is warm (usually within 10 minutes), the thermostat begins to open and let coolant flow into the radiator to cool it down some. A properly operating thermostat will continue to cycle until the coolant reaches the operating temperature of the thermostat--usually around 180 deg F. Then the thermostat will continue to adjust its opening to maintain that temp.

Thermostats can get stuck in both closed and open positions. When stuck closed, the engine will quickly overheat. When stuck open, the engine will take forever to warm up--especially in cold weather because the coolant is continually pushed into the radiator and cooled off before it ever has a chance to get warm. Changing the inexpensive thermostat may help correct your condition.

common impala problem friend of mine has a 2000 with the same problem just cover the grill so that cold air does not blow into the rad it should give you your heat back

Hello,

Humm I make the assumption that you don't have overheating problems. Yes, sounds like a thermostat is stuck open. If you have a gage on the dash you may also notice that the engine temp takes a long time also. Sometimes when you sit a light for a while the temp edges up and starts to get warm....then when moving down the road a higher speeds the temp cools off again. this does this because the thermostat may be stuck open and it cools the heated water in the engine when moving. Also, check the coolant level in the radiator. (only do this when cold!!!!!!!!) ok????? NOT HOT! low coolant can affect how the heater performs. (low volume)

Hope this helped. :)
Chris