2005 f350
Thread Starter
|
2nd Gear
Joined: Jul 2022
Posts: 2
Likes: 0
From: monterey ca
f350 super duty
good to hear from you do you have a problem getting heat even after running seems like the a/c is on all the time
Trending Topics
Cargo Master
Joined: Aug 2003
Posts: 2,332
Likes: 442
From: Eastern Washington
How is your coolant level? Low/no heat is the first symptom of low coolant.
Heater core could also be plugged up. At operating temp with heat selected the heater hoses should be warm on both sides of the heater core.
Manual or Auto Climate controls?
With vehicle running put heater control to vent or floor position.
Confirm the AC clutch is not engaging.
Have someone cycle the heater control from cold to hot, watch the heater control valve and confirm it's moving.
If the mode is stuck on defrost or the heater valve does not move confirm the vacuum pump is plugged in and working. It usually runs for 15 seconds before startup, you should hear it from inside the cab. It's on the passenger fenderwell behind the battery.
If it does run confirm there is vacuum at the reservoir, then at the heater control valve.
If there is vacuum at the heater control valve but it's stuck in the cold position I'd suspect a faulty heater control valve. If you disconnect the vacuum line you should be able to actuate it by hand and control the flow of coolant.
Report back.
Heater core could also be plugged up. At operating temp with heat selected the heater hoses should be warm on both sides of the heater core.
Manual or Auto Climate controls?
With vehicle running put heater control to vent or floor position.
Confirm the AC clutch is not engaging.
Have someone cycle the heater control from cold to hot, watch the heater control valve and confirm it's moving.
If the mode is stuck on defrost or the heater valve does not move confirm the vacuum pump is plugged in and working. It usually runs for 15 seconds before startup, you should hear it from inside the cab. It's on the passenger fenderwell behind the battery.
If it does run confirm there is vacuum at the reservoir, then at the heater control valve.
If there is vacuum at the heater control valve but it's stuck in the cold position I'd suspect a faulty heater control valve. If you disconnect the vacuum line you should be able to actuate it by hand and control the flow of coolant.
Report back.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Thread
Thread Starter
Forum
Replies
Last Post