Heat Pumps and Electric Heating - Heating and Air Unit - Overheating?
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antoine24
11-19-04, 10:12 PM
Hi, I'm having a problem with our heating unit. It heats the house just fine - reaches the desired tempature (72) and the blowers kick off and no air comes out the vents. This is when the trouble seems to start though. Hot air seeps from the return air vent - it doesnt blow out with force, it just comes out. Also the unit is located under the house and the floor above the unit gets hot. All of the extra heat causs the tempature to rise as high as 85 degrees making the house miserable. It has never done this in prevoius winters, so I'm really confused as to what's going on under there. Any ideas?
hvac4u
11-20-04, 06:21 AM
that does not sound good. get a tech out there as soon as possible, do you have a CO detector?
Sharp Advice
11-20-04, 07:03 AM
Hello Antoine24. Welcome to the Heating Furnaces forum topic and the Do It Yourself Web Site.
The symptom and condition you're describing is rare but does happen. Seen it a few times myself. The gas valve is not fully closing at the end of the heating cycle. Therefore, when the gas valve does not fully close, the burner flames remain on but at a much lower flame size with the fan off.
That condition creates the constant residual heat which causes the intake vent to spill warm air and the floor above the furnace, since the furnace is under the house, to become warm.
If this is the condition present at your house, it is highly serious and very dangerous. Prompt attention to the matter is a must. Seek professional help as soon as possible.
If you are able, crawl under the house and turn off the gas supply valve on the supply pipe to that furnace asap. Or contact the gas supplier and have them do so immediately. Do not continue to use that furnace in it's present condition. GET PROFESSIONAL HELP IMMEDIATELY!
The symptom and condition you're describing is rare but does happen. Seen it a few times myself. The gas valve is not fully closing at the end of the heating cycle. Therefore, when the gas valve does not fully close, the burner flames remain on but at a much lower flame size with the fan off.
That condition creates the constant residual heat which causes the intake vent to spill warm air and the floor above the furnace, since the furnace is under the house, to become warm.
If this is the condition present at your house, it is highly serious and very dangerous. Prompt attention to the matter is a must. Seek professional help as soon as possible.
If you are able, crawl under the house and turn off the gas supply valve on the supply pipe to that furnace asap. Or contact the gas supplier and have them do so immediately. Do not continue to use that furnace in it's present condition. GET PROFESSIONAL HELP IMMEDIATELY!
Ed Imeduc
11-20-04, 08:04 AM
Like said get a hvac tech to check it out "NOW". I take it its a horizontal gas unit down there. They like to be cleaned and serviced every year.
ED ;)
ED ;)
antoine24
11-20-04, 10:31 PM
Hello Antoine24. Welcome to the Heating Furnaces forum topic and the Do It Yourself Web Site.
The symptom and condition you're describing is rare but does happen. Seen it a few times myself. The gas valve is not fully closing at the end of the heating cycle. Therefore, when the gas valve does not fully close, the burner flames remain on but at a much lower flame size with the fan off.
That condition creates the constant residual heat which causes the intake vent to spill warm air and the floor above the furnace, since the furnace is under the house, to become warm.
If this is the condition present at your house, it is highly serious and very dangerous. Prompt attention to the matter is a must. Seek professional help as soon as possible.
If you are able, crawl under the house and turn off the gas supply valve on the supply pipe to that furnace asap. Or contact the gas supplier and have them do so immediately. Do not continue to use that furnace in it's present condition. GET PROFESSIONAL HELP IMMEDIATELY!
I'm sorry - I should have mentioned this is an electric heating unit - I assume that makes a huge difference. I shut the thing down yesterday for about and hour and then restarted it. The floor didnt heat back up today and I felt no warm air coming from the return air vent. Definitely gonna get it looked at though.
The symptom and condition you're describing is rare but does happen. Seen it a few times myself. The gas valve is not fully closing at the end of the heating cycle. Therefore, when the gas valve does not fully close, the burner flames remain on but at a much lower flame size with the fan off.
That condition creates the constant residual heat which causes the intake vent to spill warm air and the floor above the furnace, since the furnace is under the house, to become warm.
If this is the condition present at your house, it is highly serious and very dangerous. Prompt attention to the matter is a must. Seek professional help as soon as possible.
If you are able, crawl under the house and turn off the gas supply valve on the supply pipe to that furnace asap. Or contact the gas supplier and have them do so immediately. Do not continue to use that furnace in it's present condition. GET PROFESSIONAL HELP IMMEDIATELY!
I'm sorry - I should have mentioned this is an electric heating unit - I assume that makes a huge difference. I shut the thing down yesterday for about and hour and then restarted it. The floor didnt heat back up today and I felt no warm air coming from the return air vent. Definitely gonna get it looked at though.
Sharp Advice
11-21-04, 06:18 AM
Since the heating unit is an electric unit (Heat Pump) and not a gas fired unit, all the replies posted thus far than do not apply. I will move the question into the "Heat Pumps & Electric Heating" topic.
Forum Monitors Note:
This thread has been moved.
Originally posted in the heating furnaces topic.
Web Site Host & Forums Monitor
Personal Reminder:
Buckle Up & Drive Safely.
"The Life You Save, May Be Your Own."
Forum Monitors Note:
This thread has been moved.
Originally posted in the heating furnaces topic.
Web Site Host & Forums Monitor
Personal Reminder:
Buckle Up & Drive Safely.
"The Life You Save, May Be Your Own."
Ed Imeduc
11-21-04, 12:34 PM
You still dont say if you have a heatpump there are not. Could be the strip heaters where stuck on. When it does this again have some one look at it so they can find the ones stuck on. On a heat pump unit.The outside unit could be on and the blower didnt work in side. might check that out next time
ED ;)
ED ;)