Heater does not blow. I am not sure what it is. HELP

SOURCE: Replace heater core for Honda Accord 1992 LX 2.2L

It's probably the valve in the cooling hose that lets coolant flow into your heater core. This is up against the firewall about 3/4 of the way down on the passenger side. When you switch the knob from warm to cool, you should be able to see the little "arm" on the hose move back and forth. You may need someone else to watch as you move the temperature knob back and forth.

Also, watch out for over heating (not due to the valve), because it could mean that you could need to replace your water pump and/or thermostat in the near future. If you haven't replaced your timing belt recently (or if you have) and didn't change the water pump at the same time (Honda recommended) Your water pump could be failing.

Odds are pretty good though that it's just where the cable connects to the valve. It may have rusted over time and stuck, or broke the end of the cable, or just need lubricating/bending back into place.

If this is not the case, then you may just have a clogged heater core and should have your coolant system thoroughally flushed in the near future. If none of these work, you may need to replace your heater core.

Drop me a line when you check these over and I'll see what I can come up with.

Ralph

SOURCE: heater only blows hot air when pressing on the gas pedel.

that is most likely caused by a lack of coolant flow thru your heater core, have your local repair facility ( or yourself if you are able) flush the heater core.

They only need to flush the heater core, this is no the same as a coolant flush as that puts very little pressure on the heater sore and will not be sufficiant to dislodge any debris in the heater core.

SOURCE: 2003 accord air conditioner

This is a common problem when the AC system has a low charge.
If this is the case, you have a leak somewhere. Do not try to fix it yourself without the proper equipment.

SOURCE: Why would the heater not blow warm air after car

Yes, that would indicate a stuck thermostat:
This is how you change it, or have it changed:
Disconnect the negative battery cable from the battery (if you have an anti-theft radio, make sure you have the code)
Drain the cooling system. Drain petcock is at the bottom of the radiator. (if the coolant is fairly new, save it)
Follow the LOWER radiator hose to the thermostat housing.
Compress the hose clamp with pliers and work the hose off the housing (you might want to replace the clamp with a better type when you put it back).
Remove the bolts and detach the housing cover. If the cover is stuck, tap it with a soft-faced hammer to jar it loose. Be prepared for some coolant to spill out when the gasket seal is broken.
IMPORTANT: Note how the thermostat is installed (which end is facing out) then remove the thermostat.
Stuff a rag in the opening, then carefully clean off any remaining gasket and/or sealant from the housing and the cover with a scraper. Remove the rag and wipe the surfaces.
Install the new thermostat in the housing, making sure the correct end faces out and make sure the air bleed (usually a little arrow) is at the top.
Apply a thin coat of RTV sealant to both sides of the new seal (gasket) and position it on the housing and replace the cover and the bolts. Tighten to 9 ft.lbs torque.
Replace the hose and clamp. Refill the coolant system (radiator).
Run the engine until warm and check for leaks and proper gauge temp, and check your overflow bottle in case more coolant is needed.
Hope this helps you deal with the problem.

Testimonial: "Thank you so much for the help with the thermostat. It works great now. Just have one problem. The temp gage doesn't read anything now.Why?"

SOURCE: heater blow cold air in my 1994 Honda Accord (4

Yes clogged heater core may be the answer in your case .