Jasorono
NAXJA Forum User
- Location
- Ottawa, Canada
Hello everyone,
I'm kind of looking for some confirmation of what this could be.
I have a heating issue that started gradually since winter started. I don't know if the "Gradually" part is because it gradually got colder or the problem has been getting worse, but here goes.
1. I am getting very little heat in my 99 Cherokee, which gets worse as the temperature gets lower.
2. As an added bonus, I have a busted blower motor resistance, so my heater fan only goes to top speed, which I think just make whatever heat I get in the core disappear faster.
3. I checked my coolant levels last week, and was a tiny bit low, so I topped it off. I did not notice a problem.
4. I took it in to get my muffler repaired, and asked to get the core flushed, but they didn't want to do it because they found sealant in the coolant. Said I would need to take it to a Radiator shop to get it steam cleaned (but they didn't necessarily say my core was clogged).
5. I think the thermostat is good because I get normal engine temp. it's very stable and builds up temp as it always has.
6. I checked to make sure my trim door. I've put it to cold and back to hot, and there is a big difference.
7. When it gets very cold, like under -10 Celsius (under 15 Fahrenheit) it will only blow warm (not hot) air at higher RPM. So I need to take off, get on the road before anything reasonable comes out.
My question is, could it be
1. a bad water pump? (Would that still allow the engine to operate normally and just not supply enough flow for the heater core?)
2. Blocked Heater core? not enough flow through it, resulting in heater core flow only at higher RPM?
3. any other ideas?
ps. When spring comes around, I am planning on replacing my AC evaporator and heater core while I'm at it. I am not doing this in the freakin Canadian winter (I like my fingers too much). So if it's most likely the Core, I'll just wait until then. Same would go for the water pump too I guess LOL.
I'm kind of looking for some confirmation of what this could be.
I have a heating issue that started gradually since winter started. I don't know if the "Gradually" part is because it gradually got colder or the problem has been getting worse, but here goes.
1. I am getting very little heat in my 99 Cherokee, which gets worse as the temperature gets lower.
2. As an added bonus, I have a busted blower motor resistance, so my heater fan only goes to top speed, which I think just make whatever heat I get in the core disappear faster.
3. I checked my coolant levels last week, and was a tiny bit low, so I topped it off. I did not notice a problem.
4. I took it in to get my muffler repaired, and asked to get the core flushed, but they didn't want to do it because they found sealant in the coolant. Said I would need to take it to a Radiator shop to get it steam cleaned (but they didn't necessarily say my core was clogged).
5. I think the thermostat is good because I get normal engine temp. it's very stable and builds up temp as it always has.
6. I checked to make sure my trim door. I've put it to cold and back to hot, and there is a big difference.
7. When it gets very cold, like under -10 Celsius (under 15 Fahrenheit) it will only blow warm (not hot) air at higher RPM. So I need to take off, get on the road before anything reasonable comes out.
My question is, could it be
1. a bad water pump? (Would that still allow the engine to operate normally and just not supply enough flow for the heater core?)
2. Blocked Heater core? not enough flow through it, resulting in heater core flow only at higher RPM?
3. any other ideas?
ps. When spring comes around, I am planning on replacing my AC evaporator and heater core while I'm at it. I am not doing this in the freakin Canadian winter (I like my fingers too much). So if it's most likely the Core, I'll just wait until then. Same would go for the water pump too I guess LOL.